Alimentary system

Question 1

4 y.o. cat S/F, progressive weight loss

What are the possible DDxs for this lesion? What is the actual diagnosis?

Answer 1

DDxs: gingivitis due to FIV, SCC, renal failure, calicivirus

Actual diagnosis: SCC

Question 2

Tissue from 4 y.o. cat with SCC

What are the possible DDxs? What is the actual diagnosis?

Answer 2

DDxs: Reactive hyperplastic lymph node or metastasis of SCC

Actual diagnosis: reactive hyperplastic lymph node that is responding to a tumor

Question 3

What is this tissue? What is its function?

Answer 3

This is the esophagus of a leatherback sea turtle

Function: facilitate swallowing of prey - prevents regurg

Question 4

Tissue from a horse.

MDx? Etiology?

Answer 4

MDx: ileal muscular hypertrophy

Etiology: Anoplocephala perfoliata
(causes thickening of ileum wall, resulting in stenosis of the lumen)

Question 5

Small intestine from a cow.

MDx? EDx? Etiology? Disease name?

Answer 5

MDx: diffuse granulomatous enteritis

EDx: Mycobacterium enteritis

Etiology: Mycobacterium avium subsp. paratuberculosis

Dz name: Johne’s disease

Question 6

Liver from a pig.

MDx? Etiology? Second etiology? Common/dz name?

Answer 6

MDx: Multifocal hepatic fibrosis

Etiology: Ascaris suum (kidney worm of pigs)

2nd etiology: Stephanurus dentatus

Common/dz name: Milk spotted liver

Question 7

Small intestine of a pig.

Disease name? Etiology?

Answer 7

Disease: Porcine Proliferative Enteritis

Etiology: Lawsonia intracellularis

Question 8

Small intestine of a pig.

MDx? Would you expect to see this in a young or old animal?

Answer 8

MDx: proliferative ileitis

Will see in older animals

Question 9

Horse stomach. yuck.

MDx? Etiology? What else would expect to see in a horse with this lesion?

Answer 9

MDx: erosive and ulcerative gastritis

Etiology: Canthardin (found in Alfalfa hay)

Results in colic, enteritis, ulcerative and hemorrhagic uritis, myocarditis