Intramural Benign Intestinal Tumors
Michael P. Federle, MD, FACR
Key Facts
Imaging
Lipoma
Most commonly diagnosed SB tumor (easy to recognize on CT)
Most common cause of SB intussusception (symptomatic)
GI stromal tumor (GIST)
Most common type (if duodenum is included)
Often has central necrosis, may communicate with lumen
Leiomyoma
Calcifications and necrosis are common (in this rare tumor)
Hemangioma
Usually small, ± calcified phleboliths
Neural tumors
Schwannoma, paraganglioma, neurofibroma
Multiple SB neurofibromas may be seen in neurofibromatosis type 1 (NF1)
Top Differential Diagnoses
Intestinal metastases and lymphoma
Small bowel carcinoma
Intramural hematoma
Clinical Issues
Asymptomatic (most common)
GI bleeding, intestinal obstruction, intussusception
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