Breast adenomyoepithelioma, a case report

BACKGROUND: Adenomyoepithelioma is a rare tumor of the breast characterized by a dual/biphasic proliferation of two cell populations: the epithelial cells and the myoepithelial cells. The first case was reported in 1970. The majority of the cases are benign, but few malignant cases were reported in literature. CASE PRESENTATION: A case of a 66-year-old lady presenting with an asymptomatic breast mass, of 18 × 17 × 15 mm size with irregular borders and negative metastatic workup. The patient was operated for wide local excision of the tumor, with a confirmed negative margins intraoperatively. The final pathology was Adenomyoepithelioma. CONCLUSION: We report this rare case to encourage physicians to keep this etiology in mind as part of the differential diagnosis of breast mass.