Intestine

Question 1

Meckel’s Diverticulum

Answer 1

Incomplete involution of vitelline duct; congenital outpouching disorder
Rule of 2 (*KNOW FOR EXAM) – 2% of normal population, within 2 feet of ileocecal valve, average 2 inches in length
commonly asymptomatic

Question 2

Malabsorption Syndromes in Small Intestine

Answer 2

secretion insufficiency, impaired motility with bacterial overgrowth and bile salt inactivation, impaired mucosal function
Defective absorption of fats, fat soluble and other vitamins, proteins, carbohydrates, electrolytes, minerals and water
Clinically present with chronic diarrhea
Typically fatty feces (steatorrhea)

Question 3

Celiac disease (

Answer 3

enteropathy triggered by ingestion of gluten containing diet
proximal part of intestine
here is HLA association with celiac disease
Marked atrophy and loss of villi

Question 4

serologic tests for GSE

Answer 4

tTg use dcurrently, AGA used in past

Question 5

Intestinal obstruction

Answer 5

More common in small bowel
Numerous causes – luminal (within lumen), intramural (within bowel wall), extramural/mechanical causes
Pseudo-obstruction – no localized lesion,

Question 6

Intramural

Answer 6

Congenital atresias (fistula)
Inflammatory conditions – Crohn’s TB, drug-induced stenosis, ischemic strictures, radiation damage, polypoid or infiltrative neoplasms

Question 7

Extramural

Answer 7

all require surgical intervention)
Generally diseases of peritoneum – congenital mesenteric/omental bands, peritoneal tumors
Intussusception – telescoping of proximal bowel segment into distal (in adults, often due to tumor)

Volvulus – twisting of bowel loop