GI Section 1: Luminal (Infections)

Question 1

Parasite that causes bloody diarrhea.

Can cause liver abscess, spleen abscess, or even brain abscess.

Answer 1

Entamoeba Histolytica

Question 2

One of the causes of toxic megacolon

Answer 2

Entamoeba Histolytica

Question 3

“flash shaped ulcers

Answer 3

Entamoeba Histolytica

Question 4

“coned cecum”

Answer 4

Entamoeba Histolytica

Question 5

Entamoeba Histolytica involves what part of the colon?

Answer 5

Cecum + Ascending

Spares the terminal ileum

Question 6

Answer 6

cheng in the noraml bulbous appearance of the cecum.

Question 7

Typically involves the terminal ileum, and is another cause of the “coned cecum” appearance.

Answer 7

Colonic TB

Question 8

Answer 8

Colonic TB

Cecum is pulled up (via scarring) out of the RLQ. Causes both ulcers and areas of narrowing.

Question 9

Answer 9

Colonic TB

fleischner sign

enlarged gaping IC valve, and narrow TI - gives the impression of an inverted umbrella.

Question 10

Answer 10

Colonic TB

Stierlin sign

sign of acute on chronic disease. Swollen lips of the IC valve allow for rapid emptying of the contrast from the cecum but persistent barium in the TI

Question 11

Seen in patients who are immunosuppressed. Causes deep ulcerations - which can lead to perforation.

Answer 11

Colonic CMV

Question 12

Cowdry Type A intranuclear inclusion bodies (whatever the fuck that means).

Answer 12

Colonic CMV

Question 13

Classically seen after antibiotic therapy, the toxin leads to a super high WBC count.

Answer 13

C-Diff

Question 14

Answer 14

Clostridium dificille

“Accordion sign”

enhancing edematous mucosa or contrast trapped inside mucosal folds

Question 15

Answer 15

“thumb print sign”

Seen in C. diff and also in toxic megacolon

Question 16

Infection limited to the cecum occurring in severe neutropenia.

Answer 16

Neutropenic Colitis (Typhlitis)