•Chronic,
watery, non-bloody diarrhea
•Normal/near
normal colonoscopy
–May have patchy edema, loss of
vascularity, erythema, occasional mucosal fracture
•Abnormal
colonic biopsy
–Lamina propria inflammation
–Intraepithelial
lymphocytosis
–Surface epithelial
flattening
–+/- thick subepithelial collagen
band