Extras: Lower GI Tract

Question 1

Bacteria associated with Guillan barre and erythema nodosum

Answer 1

Campylobacter jejuni

Question 2

What bacterial infection targets M cells in epithelium over Peyer’s patches -> aphthous ulcers

Answer 2

Shigella

Question 3

Triad of sx for Whipple disease

Answer 3

WL + diarrhea + arthralgias

Question 4

Most parasites have eggs in feces except three - which three and what is in the feces instead

Answer 4

1. Strongyloides stercoralis: larvae
2. Amebiasis: cysts and trophozoites
3. Giardia: cysts and trophozoites

Question 5

Size at which AA is considered an AAA

Answer 5

3cm+

Question 6

Two main causes of toxic megacolon

Answer 6

1. CDIFF

2. IBD

Question 7

IBS on histo

Answer 7

Nothing notable

Question 8

Two types of microscopic colitis + pt population

Answer 8

1. Collagenous colitis: middle aged women

2. Lymphocytic colitis: celiac dz/ autoimmune

Question 9

Hemorrhoids tx

Answer 9

1. Treat pain and constipation
2. Possible injections
3. Possible rubber band ligation

Question 10

Syndrome associated with inflammatory polyps

Answer 10

SRUS

Question 11

Syndrome associated with increased adenomatous polyps

Answer 11

SSPCS: sessile serrated polyposis CA syndrome

Question 12

Two mutations possible in colon adenocarcinoma

Answer 12

1. MSI: micro satellite instability

2. APC/B catenin/Wnt pathway

Question 13

L sided vs R sided colon adenocarcinoma sx

Answer 13

1. Left: rectal bleed, change in BMs, abd/back pain

2. Right: occult blood loss, anemia, WL

Question 14

Barium enema shows what sign with colon adenocarcinoma

Answer 14

Apple core sign

Question 15

Where does HNPCC / Lynch syndrome typically cause CA?

Answer 15

Ascending colon

Question 16

What do lesions look like in HNPCC?

Answer 16

Napkin ring lesions