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

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Lymphoma of intestines

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Large granular cell lymphoma - intestines

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Scirrhous carcinoma - in small intestine (adenomcarcinoma)

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

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Gastric adenocarcinoma

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Intestinal adenocarcinoma

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Intestinal adenocarcinoma

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

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Gastric squamous cell carcinoma

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Leiomyoma (intestinal stromal tumour)

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Leiomyosarcoma - polypoidal mass sticking out into the lesion

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Intussusception - due to leiomyosarcoma

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Tumour w/ spindle cells

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

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Smooth muscle tumour - cKIT-

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Mesothelioma - peritoneum of horse (tiny specks)

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Equine lipoma in peritoneum - pedunculated

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Equine lipoma - peritoneum

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Equine lipoma in peritoneum

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Capybara - carcinoma on peritoneum

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Anal sac carcinoma - dog

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Perianal (hepatoid) gland adenoma - dog

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Pancreatolyths

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Severe avian necrotic enteritis

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Avian necrotic enteritis

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Deep pyoderma - caused by Staphylococci / Streptococci

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Erysipelothrix rhusiopathiae