Woman with chronic constipation.
Findings: Mildly enhancing, smoothly marginated 10 x 10 cm soft tissue density mass in the right lower quadrant mesentery, with no surrounding desmoplastic reaction. Mass slightly displaces several adjacent small bowel loops, and partially encases a loop without obstruction. There are several enlarged mesenteric lymph nodes immediately superior to the mass.
- Gastrointestinal stromal tumor
- Desmoid tumor
- Sclerosing mesenteritis
Diagnosis: High-grade B-cell lymphoma