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Gastrointestinal Imaging

E2686. What’s in the Gut? An Illustrative Case-Based Review of Small Bowel Masses

Storer L1,  Deshmukh M2,  Kadell B1,  Jude C2,  Patel M.1,2 1. University of California, Los Angeles, Los Angeles, CA; 2. Olive View– University of California, Los Angeles Medical Center, Sylmar, CA

Address correspondence to L. Storer (

Background Information: Despite the small bowel making up 90% of the surface area and 75% of the length of the gastrointestinal tract, it is the site of only 2% of gastrointestinal tract tumors. The spectrum of benign and malignant tumors is broad and early diagnosis often presents a diagnostic challenge for both clinicians and radiologists. Recognition of characteristic imaging features combined with understanding of relevant clinical implications will allow the radiologist to provide guidance on further management.

Educational Goals/Teaching Points: After reviewing this case-based review, participants will recognize the wide range of benign and malignant small bowel tumors and tumor-like lesions, including lipomas, leiomyomas, polyps and polyposis syndromes, carcinoid, adenocarcinoma, lymphoma, gastrointestinal stromal tumors and metastases and describe common and distinct imaging characteristics of these tumors. In addition, participants will be able to integrate radiologic assessment with clinical features and treatment to provide guidance on further workup to referring specialists.

Key Anatomic/Physiologic Issues and Imaging Findings/Techniques: We will include an imaging review of the spectrum of benign and malignant small bowel tumors and tumor-like lesions on CT, MRI, PET, fluoroscopy, CT enterography, and MR enterography and identify clues to distinguish among the entities. In addition, clinical features, pertinent pathophysiology, and treatment options for these lesions will be discussed.

Conclusion: Familiarity of the multimodality imaging appearance of small bowel tumors and tumor-like lesions will enable the radiologist to integrate imaging findings with pertinent clinical features and guide referring providers on further workup.