Malabsorption
(fatty; ↑ fecal fat, ↑ osmotic gap, ↓ diarrhea w/ fasting)
- Defective mucosal absorption of nutrients b/c Δs in: mucosal surface (surgical resection) or gen. mucosal dis. (celiac, IBD). Bloating, foul-smelling, floating stools (steatorrhea).
Celiac disease Whipple’s disease Small intestinal bacterial overgrowth (SIBO)
Other:
- s/p short bowel resection (short bowel syndrome),
- chronic mesenteric ischemia,
- eosinophilic gastroenteritis,
- intestinal lymphoma,
- tropical sprue,
- Giardia infection