Review Question - QID 108114

A 34-year-old male complains of an extremely itchy rash. On further questioning, the patient recalls that he was previously diagnosed with a disease that causes him to experience diarrhea with his typical American diet. His past medical history is significant for iron deficiency anemia. He denies any recent travel or alcohol use. He states that he is not lactose intolerant. On physical examination, there appear to be excoriations in the dorsal aspect of his forearms and elbows. He shows the physician a photo that he took of his skin lesions before he excessively scratched them (Figure A). Which of the following is most likely true of the disease present in this patient?