A 24-year-old man comes to the physician for a 5-month history of diarrhea and a 10-lb weight loss. Physical examination shows pallor and mild pitting edema of the lower extremities. Sudan Black B and Oil Red O stains of the stool are positive. The patient’s brother has type I diabetes mellitus. Which of the following is most likely to be seen in this patient?
Granulomata
Increased red cell distribution width
Normal D-xylose test
PAS-positive macrophages in the lamina propria
Subacute combined degeneration
