Brazilian Journal of Veterinary Pathology
type: channel
description: The purpose of the BJVP, a peer-reviewed journal, is to publish original full papers, short communications, case reports, letters, reviews (by invited experts) and abstracts of scientific meetings. The preferable subjects is natural and experimental pathology. All the articles are submitted to scientific reviewers.
publisher: ABPV
language: en
publication name: Brazilian Journal of Veterinary Pathology
issn: 1983-0246
items: https://bjvp.org.br/bjvp/article/view/553
items: Pulmonary vascular amyloidosis in an aged dog
items: Fibrinosuppurative valvular endocarditis withmyxomatous valvular degeneration in a mare
items: Nasal neuroendocrine carcinoma in a dog
items: Acute colic secondary to sand enteropathy (sablosis) in a horse
items: Hepatic eimeriosis in rabbits
items: Uremic gastritis and calcium oxalate crystallization in a dog
items: Xanthogranulomatosis in an eclectus parrot
items: Equine Nocardioform Placentitis
items: Parvovirosis in a margay (Leopardus wiedii)
items: Congenital goiter in sibling goat kids
items: Ultimobranchial body cyst in a neonatal goat
items: Strangles and infarctive purpura hemorrhagica in a horse
items: Heartworm in a southern tiger cat (Leopardus guttulus) in Santa Catarina, Brazil
items: Clinicopathologic features, tumor staging, and intratumoral inflammation in canine oral non-tonsillar squamous cell carcinomas
items: Primary extraskeletal osteosarcoma of the omentum in a young dog
items: Cholangiocarcinoma with splenic metastasis in a red-tailed amazon (Amazona brasiliensis)
items: Neurotuberculosis in a Holstein-Friesian Calf from the State of Rio Grande do Sul, Brazil
items: Causes of death in captive Psittaciformes in the Jaboticabal region, Brazil (2014-2024)
items: A case of systemic pulmonary collaterals in a Doberman Pinscher with dilated cardiomyopathy phenotype
items: Canine myxoid mesothelioma with clinical presentation of Pseudomixoma peritonei
items: Canine large t-cell intravascular lymphoma – report of two cases
items: Toxoplasma encephilitis in a Collared Peccary (Dicotyles tajacu): clinical and pathological findings
items: Benign sebaceous gland tumor in a giant otter (Pteronura brasiliensis)
items: Primary and metastatic alveolar rhabdomyosarcoma: clinical case reports in canines from the Peruvian Amazon
items: First report of gastroschisis in black-eared opossum (Didelphis aurita)
items: Angiostrongylus vasorum infection in a fox
items: Arterial calcification in a rabbit
items: Bursal cryptosporidiosis in a kelp gull (Larus dominicanus)
items: Necro-hemorrhagic enteritis and necrotizing hepatitis in green anaconda (Eunectes marinus)

https://bjvp.org.br/bjvp/article/view/553
type: item
title: Anais do 8º Congresso de Patologia Veterinária (CPV), XXII Encontro Nacional de Patologia Veterinária(ENAPAVE), XVI Simpósio Brasileiro da Davis-Thompson Foundation, VII Encontro Internacional de Saúde Animal e Prevenção (ENISAP) e I Simpósio de Sanidade Animal do CRMV-MT
description: É com grande satisfação que apresentamos os anais do 8º Congresso de Patologia Veterinária (CPV), do XXII Encontro Nacional de Patologia Veterinária (ENAPAVE), do XVI Simpósio Brasileiro da Davis-Thompson Foundation, do VII Encontro Internacional de Saúde Animal e Prevenção (ENISAP) e do I Simpósio de Sanidade Animal do CRMV-MT. Este magnífico evento ocorreu de 09 a 12 de setembro de 2025, no Centro de Eventos do Pantanal, em Cuiabá, Mato Grosso, Brasil. Estes eventos associados foram frutos de uma colaboração entre a Associação Brasileira de Patologia Veterinária (ABPV) e o Colégio Brasileiro de Patologia Animal (CBPA), contando com o valioso apoio da Davis-Thompson Foundation, da Universidade Federal do Mato Grosso, do Conselho Regional de Medicina Veterinária do Mato Grosso, além de grande número de patrocinadores, aos quais estendemos nossos sinceros agradecimentos. Após o sucesso do retorno à forma 100% presencial do Congresso de Patologia Veterinária (CPV) alcançado durante a sua sétima edição, em João Pessoa, em 2023, é com muito entusiasmo que venho como presidente da Associação Brasileira de Patologia Veterinária (ABPV), em nome da Diretoria 2024/2025, agradecer a todos pela massiva presença no 8º CPV, XXII ENAPAVE, em Cuiabá, Mato Grosso, Brasil. A região Centro Oeste carrega um forte laço com o precursor do CPV, nosso querido ENAPAVE. O primeiro ENAPAVE ocorreu em 1983, na Universidade Federal de Mato Grosso do Sul, em Campo Grande. Apesar do evento ter visitado nossa região em várias outras ocasiões: Campo grande 2001 e 2007, Goiânia 2011 e Brasília 2017, está foi a primeira vez que o CPV/ENAPAVE ocorreu na cidade de Cuiabá. Nossa cidade é reconhecida frequentemente como referência em altas temperaturas, mas mostramos, durante o evento, que nosso calor humano e acolhida é mais escaldante que as altas temperaturas de nossa cidade. O evento ocorreu entre os dias 09 e 12 de setembro de 2025, no Centro de Eventos do Pantanal, local climatizado e com ampla ca…
subject:
  topic: section
  value: Supplement - Anais do 8º Congresso de Patologia Veterinária (CPV), XXII Encontro Nacional de Patologia Veterinária (ENAPAVE), XVI Simpósio Brasileiro da Davis-Thompson Foundation, VII Encontro Internacional de Saúde Animal e Prevenção (ENISAP) e I Simpósio de Sanidade Animal do CRMV-MT
subject: Annals
  topic: keywords
subject: 8º Congresso de Patologia Veterinária (CPV)
  topic: keywords
subject: XXII Encontro Nacional de Patologia Veterinária (ENAPAVE)
  topic: keywords
subject: XVI Simpósio Brasileiro da Davis-Thompson Foundation
  topic: keywords
subject: VII Encontro Internacional de Saúde Animal e Prevenção (ENISAP)
  topic: keywords
subject: I Simpósio de Sanidade Animal do CRMV-MT
  topic: keywords
creator: Fernando Henrique Furlan
creator: Francisco de Assis Leite Souza
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-30
publication date: 2025-12-30

Pulmonary vascular amyloidosis in an aged dog
type: item
description: History: The carcass of a 14-year-old, female Boston Terrier was submitted for necropsy. The clinical history for the last year was dominated by recurrent and progressive episodes of dyspnea, stertor, and tachypnea. The patient had a prior history of a grade 3 cutaneous mast cell tumor that was excised years ago. Clinical investigations during the dog’s life included thoracic radiographs, which revealed a mild patchy interstitial pattern and tracheal collapse. The owner declined blood analysis and other diagnostics on several occasions due to financial constraints. The final episode was characterized by a severe respiratory crisis with oxygen saturation below 90%. Given the poor prognosis and the animal’s deteriorating condition, humane euthanasia was performed.
subject: Diagnostic Exercises
  topic: section
creator: Constanza A. Rodriguez
creator: Jaime Weisman
creator: Francisco R Carvallo
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-22
publication date: 2025-12-22
starting page: e018S128
ending page: e018S128
doi: 10.24070/bjvp.1983-0246.018S128

Fibrinosuppurative valvular endocarditis withmyxomatous valvular degeneration in a mare
type: item
description: Clinical History: A 12-year-old Azteca mare died unexpectedly with no premonitory clinical signs being observed.
subject: Diagnostic Exercises
  topic: section
creator: Michelle Rubio Sanchez
creator: Carmina Migoni
creator: Francisco A. Uzal
creator: Javier Asin
creator: Eileen Henderson
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-22
publication date: 2025-12-22
starting page: e018S127
ending page: e018S127
doi: 10.24070/bjvp.1983-0246.018S127

Nasal neuroendocrine carcinoma in a dog
type: item
description: History: A 10-year-old male neutered Golden Retriever dog presented for seizures and a tendency for clockwise circling. A large extra-axial homogenously contrast-enhancing mass was seen with magnetic resonance imaging in the right frontal lobe/olfactory bulb area extending into the nasal cavity. A transfrontal craniotomy with debulking was performed with cytological touch impressions and biopsy. Acute-onset focal seizures and episodes of compulsive circling started around 1 month following surgery, with regrowth of the extra-axial mass with secondary perilesional edema on imaging. Euthanasia was elected.
subject: Diagnostic Exercises
  topic: section
creator: Yiqing Gong
creator: Lina Crespo Bilhava
creator: Emily Swan
creator: Elizabeth Parsley
creator: Elise LaDoucer
creator: Leslie Sharkey
creator: Emily Brinker
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-22
publication date: 2025-12-22
starting page: e018S126
ending page: e018S126
doi: 10.24070/bjvp.1983-0246.018S126

Acute colic secondary to sand enteropathy (sablosis) in a horse
type: item
description: History: A 24–year-old Stockhorse gelding presented for veterinary assessment after developing profuse watery diarrhea. The horse presented with a distended abdomen, decreased gut sounds on both quadrants on the left-hand side, absent gut sounds on the right-hand side and was hypothermic (36.8°C) with a heart rate of 44 bpm. The horse was drenched with water, paraffin oil and electrolytes via a nasogastric tube. No net reflux was obtained. Despite the administration of pain relief and sedation, the gelding’s heart rate continued to increase to 68 bpm. The gelding was transported to a referral service but died upon arrival.
subject: Diagnostic Exercises
  topic: section
creator: Althea Wang
creator: Chi Hin Ng
creator: Viviana Gonzalez Astudillo
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-22
publication date: 2025-12-22
starting page: e018S125
ending page: e018S125
doi: 10.24070/bjvp.1983-0246.018S125

Hepatic eimeriosis in rabbits
type: item
description: History One hundred and fifty 5-month-old crossbred rabbits raised for meat production were examined at a slaughterhouse. No abnormalities were observed during ante-mortem inspection.
subject: Diagnostic Exercises
  topic: section
creator: Renan Hermes
creator: Alexandre Arenales
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-22
publication date: 2025-12-22
starting page: e018S124
ending page: e018S124
doi: 10.24070/bjvp.1983-0246.018S124

Uremic gastritis and calcium oxalate crystallization in a dog
type: item
description: Clinical History: A 7-year-old female intact Welsh Corgi mix was presented to emergency services for vomiting, diarrhea, inappetence, and lethargy. Over the last 24 to 48 hours, she vomited approximately 5 to 6 times a day.
subject: Diagnostic Exercises
  topic: section
creator: Emily G. Lewis
creator: Kayla J. Alexander
creator: Timothy W. Morgan
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-22
publication date: 2025-12-22
starting page: e018S123
ending page: e018S123
doi: 10.24070/bjvp.1983-0246.018S123

Xanthogranulomatosis in an eclectus parrot
type: item
description: History: A 14-year-old female eclectus parrot was submitted for necropsy with a history of abdominal distension and weight gain,
subject: Diagnostic Exercises
  topic: section
creator: Carmina Migoni
creator: Michelle Rubio Sánchez
creator: Francisco A. Uzal
creator: Javier Asin
creator: Eileen Henderson
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-22
publication date: 2025-12-22
starting page: e018S122
ending page: e018S122
doi: 10.24070/bjvp.1983-0246.018S122

Equine Nocardioform Placentitis
type: item
description: Clinical History: A placenta from a mare following parturition was submitted for evaluation. The foal was reported to be unusually weak at birth but otherwise grossly normal with no clinical abnormalities. The mare was treated with antibiotics prior to parturition.
subject: Diagnostic Exercises
  topic: section
creator: Cassandra M. Powers
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-22
publication date: 2025-12-22
starting page: e018S121
ending page: e018S121
doi: 10.24070/bjvp.1983-0246.018S121

Parvovirosis in a margay (Leopardus wiedii)
type: item
description: Clinical History: Multiple tissue samples from various organs of a juvenile margay (Leopardus wiedii) were collected during necropsy. Before death, the animal exhibited severe weakness, vomiting, diarrhea, dehydration, abdominal discomfort, and marked leukopenia.
subject: Diagnostic Exercises
  topic: section
creator: Juan Diego Hidalgo Dittel
creator: Roger Such Basiana
creator: Laura G. Bass
creator: Gaby Dolz-Wiedner
creator: Antony Solórzano-Morales
creator: Roberto W. I. Olivares
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-22
publication date: 2025-12-22
starting page: e018S120
ending page: e018S120
doi: 10.24070/bjvp.1983-0246.018S120

Congenital goiter in sibling goat kids
type: item
description: History: Nine, adult, female Boer goats were presented to the University of California, Davis, Veterinary Medical Teaching Hospital for timed artificial insemination. To synchronize their estrous cycles, the owner gave each doe 7.5 mg dinoprost tromethamine (Lutalyse®) intramuscularly 12 hours prior to presentation and 24 hours prior to removal of the doe’s progesterone controlled intravaginal drug release device (EAZI-BREED™ CIDR®). Approximately 52 hours after prostaglandin administration, one of the does delivered two live kids, one female and one male, without complication. The neonates were unexpectedly premature by approximately two weeks. Both kids exhibited bilateral, smooth swelling at the laryngotracheal junction and generalized alopecia. Both kids were euthanized, and they were sent to the UC Davis Anatomic Pathology Service for necropsy.
subject: Diagnostic Exercises
  topic: section
creator: M Kevin Keel
creator: Elizabeth C. Rose
creator: Celeste M Morris
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-22
publication date: 2025-12-22
starting page: e018S119
ending page: e018S119
doi: 10.24070/bjvp.1983-0246.018S119

Ultimobranchial body cyst in a neonatal goat
type: item
description: History and clinical signs: A two-day-old black and white pygmy goat kid was presented to the California Animal Health and Food Safety Laboratory – San Bernardino Branch, for euthanasia and necropsy with a history of what appeared to be a fluctuant mass under the skin of the ventral side of the neck. On clinical examination, an approximately 10 cm in diameter, fluid-filled structure was palpated under the skin along the ventral aspect of the neck (Fig 1). The goat kid had pronounced dyspnea and distress particularly during palpation. Euthanasia was performed with an overdose of barbiturate and a full necropsy was performed.
subject: Diagnostic Exercises
  topic: section
creator: Tatiana Paz
creator: Eileen Henderson
creator: Javier Asín
creator: Francisco A. Uzal
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-22
publication date: 2025-12-22
starting page: e018S118
ending page: e018S118
doi: 10.24070/bjvp.1983-0246.018S118

Strangles and infarctive purpura hemorrhagica in a horse
type: item
description: History: A euthanized 23-year-old Quarter Horse gelding with an ~1-week history of fever (102.5°F), clear nasal discharge and lymphadenopathy was euthanized.
subject: Diagnostic Exercises
  topic: section
creator: Carolina Matto
creator: Carmina Migoni
creator: Michelle Rubio
creator: Akinyi Nyaoke
creator: Eileen Henderson
creator: Francisco A. Uzal
creator: Javier Asin
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-22
publication date: 2025-12-22
starting page: e018S117
ending page: e018S117
doi: 10.24070/bjvp.1983-0246.018S117

Heartworm in a southern tiger cat (Leopardus guttulus) in Santa Catarina, Brazil
type: item
description: <span class="TextRun SCXW94845773 BCX8" lang="EN-US" style="-webkit-user-drag: none; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; user-select: text; font-variant-ligatures: none !important; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 37px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; color: #0e101a; font-size: 12pt; line-height: 36px; font-family: 'Times New Roman', 'Times New Roman_EmbeddedFont', 'Times New Roman_MSFontService', serif;" xml:lang="EN-US" data-contrast="none">Heartworm disease, caused by <span class="TextRun SCXW94845773 BCX8" lang="EN-US" style="-webkit-user-drag: none; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; user-select: text; font-variant-ligatures: none !important; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 37px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; color: #0e101a; font-size: 12pt; font-style: italic; line-height: 36px; font-family: 'Times New Roman', 'Times New Roman_EmbeddedFont', 'Times New Roman_MSFontService', serif;" xml:lang="EN-US" data-contrast="none">Dirofilaria immitis<span class="TextRun SCXW94845773 BCX8" lang="EN-US" style="-webkit-user-drag: none; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; user-select: text; font-variant-ligatures: none !important; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 37px; text-transform: none; widows: 2; …
subject: Articles
  topic: section
subject: heart
  topic: keywords
subject: Dirofilaria immitis
  topic: keywords
subject: wild cat
  topic: keywords
subject: microfilaria
  topic: keywords
subject: necropsy
  topic: keywords
creator: Bruna Tizoni Guedine
creator: Jean Carlo Olivo Menegatt
creator: Alexandre de Oliveira Tavela
creator: Francielli Cordeiro Zimmermann
creator: Adriano Tony Ramos
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-22
publication date: 2025-12-22
starting page: e018020
ending page: e018020
doi: 10.24070/bjvp.1983-0246.018020

Clinicopathologic features, tumor staging, and intratumoral inflammation in canine oral non-tonsillar squamous cell carcinomas
type: item
description: <span class="NormalTextRun SCXW165922511 BCX8" style="-webkit-user-drag: none; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; user-select: text; color: #000000; font-family: 'Times New Roman', 'Times New Roman_EmbeddedFont', 'Times New Roman_MSFontService', serif; font-size: 16px; font-style: normal; font-variant-ligatures: none; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 48px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">Oral cancers, such as squamous cell carcinomas, constitute important diseases in veterinary patients, as they are <span class="NormalTextRun SCXW165922511 BCX8" style="-webkit-user-drag: none; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; user-select: text; color: #000000; font-family: 'Times New Roman', 'Times New Roman_EmbeddedFont', 'Times New Roman_MSFontService', serif; font-size: 16px; font-style: normal; font-variant-ligatures: none; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 48px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">frequently<span class="NormalTextRun SCXW165922511 BCX8" style="-webkit-user-drag: none; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; user-select: text; color: #000000; font-family: 'Times New Roman', 'Times New Roman_EmbeddedFont', 'Times New Roman_MSFontService', serif; font-size: 16px; font-style: normal; font-variant-ligatures: none; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text…
subject: Articles
  topic: section
subject: oncology
  topic: keywords
subject: cancer
  topic: keywords
subject: tumor infiltration
  topic: keywords
subject: neutrophils
  topic: keywords
subject: dog
  topic: keywords
creator: Hugo Enrique Orsini Beserra
creator: Giovana Pedro
creator: Renée Laufer Amorim
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-22
publication date: 2025-12-22
starting page: e018019
ending page: e018019
doi: 10.24070/bjvp.1983-0246.018019

Primary extraskeletal osteosarcoma of the omentum in a young dog
type: item
description: <span class="TextRun SCXW98606293 BCX8" lang="EN-US" style="-webkit-user-drag: none; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; user-select: text; font-variant-ligatures: none !important; color: #000000; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 37px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; font-size: 12pt; line-height: 36px; font-family: 'Times New Roman', 'Times New Roman_EmbeddedFont', 'Times New Roman_MSFontService', serif;" xml:lang="EN-US" data-contrast="none">Extraskeletal osteosarcoma (EOSA) is a rare and aggressive mesenchymal neoplasm in dogs, primarily affecting older animals, <span class="TextRun SCXW98606293 BCX8" lang="EN-US" style="-webkit-user-drag: none; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; user-select: text; font-variant-ligatures: none !important; color: #000000; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 37px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; font-size: 12pt; line-height: 36px; font-family: 'Times New Roman', 'Times New Roman_EmbeddedFont', 'Times New Roman_MSFontService', serif;" xml:lang="EN-US" data-contrast="none">with the spleen being the most common site of involvement<span class="TextRun SCXW98606293 BCX8" lang="EN-US" style="-webkit-user-drag: none; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; user-select: text; font-variant-ligatures: none !important; color: #000000; font-style: normal; fo…
subject: Articles
  topic: section
subject: canine osteosarcoma
  topic: keywords
subject: histopathology
  topic: keywords
subject: immunohistochemistry
  topic: keywords
subject: metastasis
  topic: keywords
subject: RUNX2
  topic: keywords
creator: João Pedro Sanches de Ávila
creator: André Gustavo Alves Holanda
creator: Caroline Cristine Ferreira Mazula
creator: João Antônio Ulhôa Oliveira
creator: Fernanda Gosuen Gonçalves Dias
creator: Pâmela Rodrigues Reina Moreira
creator: Denner Santos dos Anjos
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-22
publication date: 2025-12-22
starting page: e018018
ending page: e018018
doi: 10.24070/bjvp.1983-0246.018018

Cholangiocarcinoma with splenic metastasis in a red-tailed amazon (Amazona brasiliensis)
type: item
description: <span class="TextRun SCXW92899008 BCX8" lang="EN-US" style="-webkit-user-drag: none; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; user-select: text; font-variant-ligatures: none !important; color: #000000; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 48px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; font-size: 12pt; line-height: 36px; font-family: 'Times New Roman', 'Times New Roman_EmbeddedFont', 'Times New Roman_MSFontService', serif;" xml:lang="EN-US" data-contrast="auto">Cholangiocarcinoma is a tumor originating from the epithelium of the biliary ducts that has been frequently reported in birds, particularly within the order Psittaciformes. A red-tailed amazon (<span class="TextRun SCXW92899008 BCX8" lang="EN-US" style="-webkit-user-drag: none; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; user-select: text; font-variant-ligatures: none !important; color: #000000; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 48px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; font-size: 12pt; font-style: italic; line-height: 36px; font-family: 'Times New Roman', 'Times New Roman_EmbeddedFont', 'Times New Roman_MSFontService', serif;" xml:lang="EN-US" data-contrast="auto">Amazona brasiliensis<span class="TextRun SCXW92899008 BCX8" lang="EN-US" style="-webkit-user-drag: none; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; user-select: text; font-variant-ligatures: none !important; color: #…
subject: Articles
  topic: section
subject: avian pathology
  topic: keywords
subject: neoplasm
  topic: keywords
subject: immunohistochemistry
  topic: keywords
creator: Isabela Coelho Zanoti
creator: Bruno Simões Sérgio Petri
creator: Haroldo Ryoiti Furuya
creator: Luciana Greyce do Nascimento Souza
creator: Valéria da Silva Pedro
creator: Beatriz Azevedo Cezila
creator: Liliane Milanelo
creator: Lilian Sayuri Fitorra
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-22
publication date: 2025-12-22
starting page: e018017
ending page: e018017
doi: 10.24070/bjvp.1983-0246.018017

Neurotuberculosis in a Holstein-Friesian Calf from the State of Rio Grande do Sul, Brazil
type: item
description: <span class="TextRun SCXW227609535 BCX8" lang="EN-US" style="-webkit-user-drag: none; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; user-select: text; font-variant-ligatures: none !important; color: #000000; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 48px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; font-size: 12pt; line-height: 36px; font-family: 'Times New Roman', 'Times New Roman_EmbeddedFont', 'Times New Roman_MSFontService', serif;" xml:lang="EN-US" data-contrast="none">Bovine tuberculosis is a chronic granulomatous disease caused by <span class="TextRun SCXW227609535 BCX8" lang="EN-US" style="-webkit-user-drag: none; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; user-select: text; font-variant-ligatures: none !important; color: #000000; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 48px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; font-size: 12pt; font-style: italic; line-height: 36px; font-family: 'Times New Roman', 'Times New Roman_EmbeddedFont', 'Times New Roman_MSFontService', serif;" xml:lang="EN-US" data-contrast="none">Mycobacterium<span class="TextRun SCXW227609535 BCX8" lang="EN-US" style="-webkit-user-drag: none; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; user-select: text; font-variant-ligatures: none !important; color: #000000; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; tex…
subject: Articles
  topic: section
subject: bovine
  topic: keywords
subject: dairy cattle
  topic: keywords
subject: infectious diseases
  topic: keywords
subject: central nervous system
  topic: keywords
subject: tuberculosis
  topic: keywords
creator: Fernanda Felicetti Perosa
creator: Jean Carlo Olivo Menegatt
creator: Manoela Marchezan Piva
creator: Paola Sônego
creator: Frederico Heinz da Rocha Santos Schimdt Wiggers
creator: David Driemeier
creator: Saulo Petinatti Pavarini
creator: Welden Panziera
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-22
publication date: 2025-12-22
starting page: e018016
ending page: e018016
doi: 10.24070/bjvp.1983-0246.018016

Causes of death in captive Psittaciformes in the Jaboticabal region, Brazil (2014-2024)
type: item
description: <span class="TextRun SCXW118914361 BCX8" lang="EN-US" style="-webkit-user-drag: none; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; user-select: text; font-variant-ligatures: none !important; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 37px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; color: #0d0f1a; font-size: 12pt; line-height: 36px; font-family: 'Times New Roman', 'Times New Roman_EmbeddedFont', 'Times New Roman_MSFontService', serif;" xml:lang="EN-US" data-contrast="none">The necropsy of pet birds is an important tool for determining the cause of death and for identifying potential zoonotic or non-zoonotic etiological agents related to fatality. This retrospective study (2014 to 2024) aims to identify the main causes of death in Psittaciformes kept under human care in the Jaboticabal/SP region, Brazil. A total of 146 necropsy cases and histopathological analyses archived at the Wildlife Pathology Service of São Paulo State University, Jaboticabal campus, were examined. The most prevalently analyzed species included <span class="TextRun SCXW118914361 BCX8" lang="EN-US" style="-webkit-user-drag: none; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; user-select: text; font-variant-ligatures: none !important; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 37px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; color: #0d0f1a; font-size: 12pt; font-style: italic; line-height: 36px; font-family: 'Times New…
subject: Articles
  topic: section
subject: parrots
  topic: keywords
subject: necropsy
  topic: keywords
subject: preventive medicine
  topic: keywords
creator: Matheus Zochio
creator: Julia Victoria Gaspar Diez
creator: Maria Estela Mendes da Silva
creator: Alline Borges Salomão
creator: Igor Aguiar Macchioli
creator: Karin Werther
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-19
publication date: 2025-12-19
starting page: e018015
ending page: e018015
doi: 10.24070/bjvp.1983-0246.018015

A case of systemic pulmonary collaterals in a Doberman Pinscher with dilated cardiomyopathy phenotype
type: item
description: Dilated cardiomyopathy (DCM) in dogs is a common hereditary primary myocardial disease affecting large and giant breeds, predominantly Doberman Pinschers. This pathology is associated with mechanical and electrophysiological dysfunction of the myocardium, which is manifested by inadequate ventricular eccentric hypertrophy. Our report focuses on the case of unusual systemic pulmonary collaterals in a Doberman Pinscher with DCM phenotype. Cardiologic data have shown that myocardial histologic changes may be secondary to the presence of pulmonary collaterals and their potential influence on the development of left ventricular volume overload. Thus, we had every reason to believe that the volume overload that caused the development of congestive heart failure in this dog and possibly sudden cardiac death was caused by the presence of a combined arterial malformation. This case illustrates that atypical bypass manifestations detected during echocardiography can be further evaluated using computed tomography and angiography to further characterize and identify concomitant vascular abnormalities that might otherwise be masked or overlooked, especially when LV volume overload occurs in breeds predisposed to DCM. The research team considers it very important to publish such cases, as this will help the entire veterinary community quickly accumulate knowledge and experience for diagnostic and treatment of similar and other cases.
subject: Articles
  topic: section
subject: dogs
  topic: keywords
subject: dilated cardiomyopathy
  topic: keywords
subject: systemic pulmonary collaterals
  topic: keywords
subject: Doberman Pinscher
  topic: keywords
creator: Tatiana Vladimirovna Sereda
creator: Vladislava Konstantinovna Illarionova
creator: Dmitrii Evgenievich Mitrushkin
creator: Klavdiia Nikolaevna Naletova
creator: Ramil Rafikovich Kadyrov
creator: Aleksei Alekseevich Gazin
creator: Sergei Konstantinovich Shebeko
creator: Alexey Mikhailovich Ermakov
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-15
publication date: 2025-12-15
starting page: e018013
ending page: e018013
doi: 10.24070/bjvp.1983-0246.018013

Canine myxoid mesothelioma with clinical presentation of Pseudomixoma peritonei
type: item
description: Myxoid mesothelioma is a rare variant of mesothelioma, characterized by a myxoid component, which refers to a gelatinous extracellular matrix containing mucin. This study describes a case of myxoid mesothelioma in a 13-year-old Yorkshire Terrier that presented with sudden abdominal distension, pain, and respiratory discomfort. Imaging exams revealed an extensive amount of amorphous, homogeneous, and viscous material in the abdominal cavity. Due to unsuccessful drainage attempts, exploratory laparoscopy was performed, uncovering large volumes of gelatinous material and areas of mesenteric thickness. Despite intensive care, the animal died post-surgery and was submitted for necropsy. Gross examination revealed diffuse gelatinous material coating the omentum and mesentery, along with firm micronodular areas. Microscopic analysis showed neoplastic sarcomatoid to round cells supported by delicate fibrovascular connective tissue with abundant myxoid stroma. Marked anisocytosis, anisokaryosis and cellular pleomorphism were observed; the myxoid nature of the stroma was confirmed by intense Alcian blue staining. Immunohistochemistry revealed positive vimentin and WT1 immunoreactivity, confirming the mesothelial origin of the tumor, while pancytokeratin, carcioembryonic antigen, high molecular weight cytoqueratin, and calretinin were negative. These findings support the diagnosis of myxoid-variant mesothelioma with clinical presentation of Pseudomyxoma peritonei.
subject: Articles
  topic: section
subject: gelatinous extracellular matrix
  topic: keywords
subject: mesenchymal neoplasms
  topic: keywords
subject: mesothelial
  topic: keywords
subject: myxoid
  topic: keywords
creator: Acácia Eduarda de Jesus Nascimento
creator: Beatriz Ostertag
creator: Nayara Toledo da Silva
creator: Marina Possa dos Reys
creator: Geovanni Dantas Cassali
creator: Ayisa Rodrigues de Oliveira
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology https://creativecommons.org/licenses/by/4.0
date: 2025-12-15
publication date: 2025-12-15
starting page: e018014
ending page: e018014
doi: 10.24070/bjvp.1983-0246.018014

Canine large t-cell intravascular lymphoma – report of two cases
type: item
description: Intravascular lymphoma is rare in all species and is characterized by the intravascular proliferation of neoplastic lymphocytes, with the central nervous system being the most affected site. The aim was to report two cases of dogs diagnosed with large T-cell intravascular lymphoma. Both dogs showed neurological signs, including ataxia, seizures, and difficulty walking. Macroscopically, malacia in the brain were noted. Microscopically, there was a predominance of large neoplastic lymphocytes within the vasculature, with CD3 positive and negative to CD20, CD79a, PAX-5 immunohistochemical staining, confirming large T-cell intravascular lymphoma. The complexity of this neoplasm highlights the importance of interdisciplinary collaboration among veterinarians for differential diagnosis of central nervous system diseases.
subject: Articles
  topic: section
subject: Brain
  topic: keywords
subject: endothelium
  topic: keywords
subject: lymphoproliferative disorder
  topic: keywords
subject: dog
  topic: keywords
subject: T lymphocyte
  topic: keywords
creator: Saulo Romero Felix Gonçalves
creator: Dyeime Ribeiro de Souza
creator: Bruno Henrique Albuquerque Paiva
creator: Francisco de Assis Leite Souza
creator: Andrea Alice da Fonseca Oliveira
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology
date: 2025-09-30
publication date: 2025-09-30
starting page: e018012
ending page: e018012
doi: 10.24070/bjvp.1983-0246.018012

Toxoplasma encephilitis in a Collared Peccary (Dicotyles tajacu): clinical and pathological findings
type: item
description: Toxoplasmosis is a widespread zoonosis affecting numerous mammalian species. Wild suoids have been confirmed as susceptible hosts of Toxoplasma spp., and their meat is frequently consumed by hunters, their families, and domestic dogs, posing a growing foodborne risk in South America. We conducted a pathological study on a young captive Collared Peccary that showed neurological signs. Severe brain lesions were observed, including parenchymal necrosis with demyelination, gliosis, meningitis, and perivascular cuffing. Toxoplasma cysts containing tachyzoites, as well as free tachyzoites, were identified within these lesions. Additionally, focal necrosis with inflammatory infiltration was noted in the liver and heart, along with marked pulmonary edema. Immunohistochemistry for canine distemper virus in the brain was negative. To the best of our knowledge, this is the first report detailing the pathological findings of T. gondii infection in a wild suoid (Dicotyles tajacu).
subject: Articles
  topic: section
subject: Encephalitis
  topic: keywords
subject: Pathology
  topic: keywords
subject: Peccary
  topic: keywords
subject: Toxoplasma gondii
  topic: keywords
creator: Camila Larrañaga
creator: Kanji Yamasaki
creator: Victoria Machín
creator: Guillermo Godiño
creator: José Manuel Verdes
creator: María Belén Crampet
creator: Álvaro Modernell
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology
date: 2025-10-15
publication date: 2025-10-15
starting page: e018011
ending page: e018011
doi: 10.24070/bjvp.1983-0246.018011

Benign sebaceous gland tumor in a giant otter (Pteronura brasiliensis)
type: item
description: The giant otter (Pteronura brasiliensis) is the largest species in the Mustelidae family currently found on the Amazon, Cerrado, and Pantanal biomes, characterized by its semi-aquatic lifestyle. Globally classified as endangered, the species faces multiple anthropogenic threats, including illegal hunting, habitat destruction, human-wildlife conflicts, hydroelectric dam construction, pollution, and increased tourism activities that disturb its natural behavior and environment. This case report describes a sebaceous gland tumor in a giant otter housed in a zoological park in São Paulo state, Brazil. The animal exhibited discomfort and difficulty eating due to a neoformation in the labial commissure. Following a veterinary examination, the mass was surgically removed, and the otter recovered successfully, returning to its enclosure without complications. Histopathological analysis confirmed a benign sebaceous gland tumor, representing the first documented case in this species under human care. Further research on neoplasms in wild animals is essential to understanding cancer development, prevalence, and implications for conservation and veterinary medicine.
subject: Articles
  topic: section
subject: Brazilian otter
  topic: keywords
subject: Mustelidae
  topic: keywords
subject: zoological animal
  topic: keywords
subject: neoplasia
  topic: keywords
subject: neoplasm
  topic: keywords
creator: Rodrigo Hidalgo Friciello Teixeira
creator: Maysa Lopes Orsi
creator: André Luiz Mota da Costa
creator: Rebeca Soares dos Santos
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology
date: 2025-09-30
publication date: 2025-09-30
starting page: e018010
ending page: e018010
doi: 10.24070/bjvp.1983-0246.018010

Primary and metastatic alveolar rhabdomyosarcoma: clinical case reports in canines from the Peruvian Amazon
type: item
description: This report presents four cases of alveolar rhabdomyosarcoma in canines, affecting the striated muscular tissues of the rostral skin, mandible, uterus, and multiple metastases. These cases were treated at veterinary clinics across the San Martín region (provinces of San Martín, Moyobamba, and Tocache), Peru, from a total of 118 neoplastic cases diagnosed histopathologically at the Animal Histopathology Laboratory of the Professional School of Veterinary Medicine, National University of San Martín, between 2020 and 2024. Diagnosing alveolar rhabdomyosarcoma requires a combination of histopathological analysis, immunohistochemical markers, and molecular techniques to distinguish it from other neoplastic variants. These cases highlight the importance of histopathological analysis, appropriate selection of chemotherapy or surgical resection, owner compliance, and the limitations of empirical therapies which, in the absence of a diagnostic foundation, often lead to recurrence and treatment failure in tumor management. In recent years, cytological and histopathological diagnosis has become a key resource in the San Martín region, contributing significantly to therapeutic decision-making and the prognostic evaluation of various types of canine neoplasms.
subject: Articles
  topic: section
subject: muscle tissue
  topic: keywords
subject: dogs
  topic: keywords
subject: neoplasm
  topic: keywords
subject: oncology
  topic: keywords
creator: Victor Humberto Puicón Niño de Guzmán
creator: Alicia Maria López Flores
creator: Nieves Sandoval Chaupe
creator: Alfonso Enrique Chavera Castillo
creator: Juan Carlos Solano Ayala
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology
date: 2025-09-30
publication date: 2025-09-30
starting page: e018009
ending page: e018009
doi: 10.24070/bjvp.1983-0246.018009

First report of gastroschisis in black-eared opossum (Didelphis aurita)
type: item
description: Black-eared opossums (Didelphis aurita) are neotropical marsupials least concern with extinction in Brazil. Pathologies involving this species are rarely described, and gastroschisis has never been reported before. This study aims to report a case of gastroschisis in a black-eared opossum newborn and describe the main characteristics observed. A newborn black-eared opossum in the developmental stage in marsupial pouch was received lifeless by Núcleo de Estudos e Pesquisas em Animais Selvagens (NEPAS) of Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF). The animal was examined externally, and herniated intestinal loops were observed without the presence of the peritoneum covering them, indicating gastroschisis. This report aims to contribute to the literature on small marsupial medicine by describing the occurrence of this malformation in an individual of D. aurita.
subject: Articles
  topic: section
subject: Marsupials
  topic: keywords
subject: congenital anomaly
  topic: keywords
subject: abdominal malformation
  topic: keywords
subject: fetal development
  topic: keywords
creator: Roger da Silva Carlos
creator: Larissa Solino de Abreu Franco
creator: Maria Clara Paschoalini Liquer
creator: Anita Ladeira Gesualdi
creator: Eduardo Carlos de Souza Muniz
creator: Beatriz Salles Monteiro
creator: Álvaro José Bittencourt Bastos
creator: Leonardo Serafim da Silveira
rights: Copyright (c) 2025 Brazilian Journal of Veterinary Pathology
date: 2025-09-30
publication date: 2025-09-30
starting page: e018008
ending page: e018008
doi: 10.24070/bjvp.1983-0246.018008

Angiostrongylus vasorum infection in a fox
type: item
description: A juvenile, gray fox arrived at the zoo with dehydration, depression and poor body condition. He died the day after arrival.
subject: Diagnostic Exercises
  topic: section
creator: Renata Brizzio
creator: Cecilia Degiovanni
creator: Ana Maria Martin
rights: Copyright (c) 2025
date: 2025-03-30
publication date: 2025-03-30
starting page: e018S108
ending page: e018S108
doi: 10.24070/bjvp.1983-0246.018S108

Arterial calcification in a rabbit
type: item
description: A 6.5-year-old spayed female domestic toy rabbit (Oryctolagus cuniculus) presented with a history of apathy, weight loss for approximately 2 weeks and paralysis of both hind limbs. Due to the worsening of its condition and poor prognosis, the rabbit was euthanized.
subject: Diagnostic Exercises
  topic: section
creator: Carmen García-Romero
creator: Elena Colombino
creator: Arturo Oliver-Guimera
creator: Agustín Barragán
creator: David Viana
creator: Juan Manuel Corpa
creator: Joaquín Ortega
creator: Laura Selva
creator: Francisco A. Uzal
creator: Estefania Montero
rights: Copyright (c) 2025
date: 2025-03-30
publication date: 2025-03-30
starting page: e018S109
ending page: e018S109
doi: 10.24070/bjvp.1983-0246.018S109

Bursal cryptosporidiosis in a kelp gull (Larus dominicanus)
type: item
description: A juvenile kelp gull (Larus dominicanus) was found dead.
subject: Diagnostic Exercises
  topic: section
creator: Diego A. Yañez
rights: Copyright (c) 2025
date: 2025-03-30
publication date: 2025-03-30
starting page: e018S110
ending page: e018S110
doi: 10.24070/bjvp.1983-0246.018S110

Necro-hemorrhagic enteritis and necrotizing hepatitis in green anaconda (Eunectes marinus)
type: item
description: An adult, male, green anaconda (Eunectes marinus) from “Universidade Federal de Mato Grosso” (UFMT) Zoo’s collection showed apathy, anorexia and bloody feces. This snake died during clinical evaluation and was necropsied.
subject: Diagnostic Exercises
  topic: section
creator: Bruno Camilo de Souza
creator: João Paulo da Silva Cavasani
creator: Wuglenya Daislla Martins da Silva
creator: Caroline Argenta Pescador
creator: Edson Moleta Colodel
creator: Fernando Henrique Furlan
rights: Copyright (c) 2025
date: 2025-03-30
publication date: 2025-03-30
starting page: e018S111
ending page: e018S111
doi: 10.24070/bjvp.1983-0246.018S111