Gastric inflammatory myofibroblastic tumor in adults: a case report and literature review.

Gastric inflammatory myofibroblastic tumor (IMT) is a rare mesenchymal neoplasm of intermediate biological potential, with adult cases being particularly uncommon. We report a 64-year-old man with an incidentally detected gastric mass that was preoperatively suspected to be a gastrointestinal stromal tumor (GIST). The relevant literature on adult gastric IMT was also reviewed. Complete surgical resection with negative margins (R0 resection) remains the mainstay of treatment, whereas patients with confirmed ALK rearrangements may benefit from ALK inhibitor therapy. Histopathological confirmation and long-term surveillance are essential because of the potential for recurrence and occasional aggressive behavior.