STEEPLECHASE - PATHOLOGY III Flashcards by Zhenzhen George

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Little islands of epithelium in oral cavity

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Fibrous hyperplasia

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Ranula

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Sialocele

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Oral papillomatosis - canine papillomavirus-1

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Oral papillomatosis

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Histology of papilloma

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Melanoma - most common oral tumour in dogs

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Squamous cell carcinoma (SCC)

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Squamous cell carcinoma (SCC) - keratin pearl

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Maxillary fibrosarcoma

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Oral fibrosarcoma - spindle cells - aggressive growth + invasive pattern

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Fibromatous epulis of periodontal ligament origin

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Ameloblastic fibroma

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Granular cell tumour - oral cavity

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Papilloma - forestomach of cattle with bovine papillomavirus-4

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Peyer’s patches - very prominent in young animals and inflamed intestines

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Johne’s inflammatory cell infiltrate

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Meckel’s diverticulum - emrbyonic remnant of small intestine

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Polyp projecting into lumen

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Adenomatous hyperplasia/papillary adenoma/polyps - stomach + intestines

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Lymphoma - GIT

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Lymphoma - small intestine

Lymphoma of intestines

Large granular cell lymphoma - intestines

Scirrhous carcinoma - in small intestine (adenomcarcinoma)

Globule of mucus pushing nucleus to side = signet ring, seen in adenocarcinoma of small intestine

Gastric adenocarcinoma

Intestinal adenocarcinoma

Intestinal adenocarcinoma

Gastric squamous cell carcinoma - horse, arises from pars oesophageal, ulcerative + necrotic cauliflower-like-mass

Gastric squamous cell carcinoma

Leiomyoma (intestinal stromal tumour)

Leiomyosarcoma - polypoidal mass sticking out into the lesion

Intussusception - due to leiomyosarcoma

Tumour w/ spindle cells

+ive for brown staining (c-KIT+) - gastrointestinal stromal tumour (GIST)

Smooth muscle tumour - cKIT-

Mesothelioma - peritoneum of horse (tiny specks)

Equine lipoma in peritoneum - pedunculated

Equine lipoma - peritoneum

Equine lipoma in peritoneum

Capybara - carcinoma on peritoneum

Anal sac carcinoma - dog

Perianal (hepatoid) gland adenoma - dog

Pancreatolyths

Severe avian necrotic enteritis

Avian necrotic enteritis

Deep pyoderma - caused by Staphylococci / Streptococci

Erysipelothrix rhusiopathiae