Introduction.

Inflammatory myofibroblastic tumor is a rare proliferative disease of uncertain etiology, characterized by the proliferation of epithelioid or fused myofibroblasts mixed with predominantly mononuclear inflammatory cells. In general, it is considered a benign lesion, although in some cases this neoplasm has shown aggressive behavior in terms of local recurrence and metastasis. The definitive treatment is complete surgical resection.

Clinical case.

A 67-year-old patient with a two-month history of fever and an abdominal mass underwent a computed tomography scan of the abdomen that identified an infiltrative tumor, compromising the retroperitoneum fat in the lesser cavity. A biopsy was taken percutaneously, which reported a retroperitoneal inflammatory pseudotumor. He was taken to radical abdominal surgery, with final surgical pathology describing an inflammatory myofibroblastic tumor with multifocal involvement attached to the serosa of the stomach and small intestine without muscle involvement.

Discussion.

Inflammatory myofibroblastic tumor is a rare entity, of unknown etiology and difficult to diagnose. We present a clinical case of gastrointestinal myofibroblastic inflammatory tumor to better understand this entity.

Conclusion.

The clinical case of a patient with a gastrointestinal myofibroblastic inflammatory tumor, a rare presentation in our environment, is described. Comparison with similar cases is important to draw useful conclusions in clinical practice.

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