This is a 13-year-old male post orthotopic heart transplantation 6 months ago admitted with abdominal pain, decreased PO intake, and diarrhea, bloody stools and emesis. Gross endoscopic findings: Multiple umbilicated and raised lesions throughout duodenum, stomach, colon, terminal ileum and ileum. GI biopsy showed the following.
Stomach:
Small Intestine:
Colon: