Test

1) stool fat : simple & reliable screening test for steatorrhea

nl < 6g/day

stain III stain

2) Xylose absorption test

25g D-xylose PO

* normal : 5hr urine xylose excretion > 4 g

2hr blood > 30mg/dL

* abnormal : proximal small intestine mucosa침범시 가장 흔함

(celiac sprue, tropical sprue등)