G I

Question 1

2 watershed zones of colon

Answer 1

Splenic flexure supplied by narrow terminal branches of the SMA
Recto sigmoid junction, supplied by narrow terminal branches of the inferior mesenteric artery.

Question 2

Radiograph sign for ischemic colitis

Answer 2

Thumb printing

Question 3

Most accepted and recommended management for the eradication of H. pylori in pts with gastric mucosa-associated lymphoid tissue lymphoma without any mets

Answer 3

Antibiotics. Omeprazol,e, clarithromycin, and amoxicillin.

Question 4

In the US – most common extra nodal site of lymphoma

Answer 4

Gastric lymphoma. The vast majority are either extra nodal marginal zone B cell lymphoma of MALT type or diffuse large B cell lymphoma.

Question 5

Classic GI presentation of Burkitt lymphoma (in GI)

Answer 5

Obstructing lesion in the terminal ileum

Question 6

Conditions that predispose to GI lymphoma

Answer 6

H. pylori infection, autoimmune diseases (due to the immunosuppressive therapy), immunodeficiency and immunosuppression, IBD, nodular lymphoid hyperplasia (when associated with immunodeficiency, like common variable immunodeficiency, selective IgA deficiency, or giardiasis) and celiac disease (enteropathy associated T cell lymphoma).

Question 7

Conditions that predispose to GI lymphoma

Answer 7

H. pylori infection, autoimmune diseases (due to the immunosuppressive therapy), immunodeficiency and immunosuppression, IBD, nodular lymphoid hyperplasia (when associated with immunodeficiency, like common variable immunodeficiency, selective IgA deficiency, or giardiasis) and celiac disease (enteropathy associated T cell lymphoma).

Question 8

Findings on upper GI series that should heighten suspicion of gastric lymphoma

Answer 8

Mass or filling defect (>70%), ulcerated lesion (40$) or diffuse infiltration (20%).