Miscellaneous GI Disorders

Question 1

IBS criteria

Answer 1

recurrent abdominal pain plus 2 or more of the following:

• improvement with defecation
• change in frequency of stool
• change in appearance of stool

Question 2

pseudodiverticula: what are they, where do they form

Answer 2

outpouchings of only mucosa and submucosa (false diverticula); where vasa recta perforate muscularis externa

Question 3

diverticulosis: what is it, pathogenesis, risk factor

Answer 3

many false diverticula of the colon, commonly sigmoid; elevated intraluminal pressure in the sigmoid colon; diets low in fiber

Question 4

dx: periumbilical pain that migrates to the RLQ

Answer 4

acute appendicitis

Question 5

where does ischemic colitis typically occur? (2)

Answer 5

watershed zones: splenic flexure, distal colon

Question 6

compare collagenous colitis with lymphocytic colitis

Answer 6

collagenous colitis has a dense subepithelial collagen layer, lymphocytic colitis is associated with celiac disase and autoimmune diseases