Myoepithelioma of the lateral abdominal wall: A case report

RATIONALE: Soft-tissue myoepithelioma is a rare neoplasm. It usually occurs in the distal or proximal extremities, but seldomly arises in the abdominal wall. PRESENTING CONCERNS OF THE PATIENT: The patient is a 40-year-old woman who presented with a painless mass at the lateral abdominal wall for 6 months. Computed tomography scan revealed a lobulated and well-defined iso-density mass showing heterogeneously moderate enhancement. The mass exhibited intermediate T1 signal and obvious high T2 signal on magnetic resonance imaging. INTERVENTIONS: The tumor was excised. Hematoxylin–eosin stain and immunohistochemical stain showed that the tumor was myoepithelioma. OUTCOMES: The patient did not undergo chemotherapy and radiotherapy. No recurrence or metastasis was noted during the 1 year follow-up. LESSONS: Radiologists should consider myoepithelioma in the differential diagnosis when finding a tumor in the abdominal wall.