RESUMEN
Mammary hamartomas are uncommon benign lesions. The reported incidence of breast hamartomas is 0.7% of benign breast tumors in female. In this paper, we report a case of breast hamartoma emphasizing the role of the pathologist in remaining this diagnosis. A 37 years old women, presented with a voluminous lump of the breast with mastodynia. On clinical examination, the lump was in the external quadrants of the right breast measuring 7 cm in the great diameter with no controlateral or axillary abnormalities. Ultrasound examination and mammography showed an ACR3 tissular heterogenic mass suggesting the diagnosis of phyllode tumor or hamartoma. On needle core biopsy the diagnosis was favor a mammary hamartoma associated to a proliferative mastopathy. The mass was excised and the histologic examination confirmed the initial diagnosis according to the clinico-radiologic context associated with mastosis. Epithelial changes and mastosis may be seen within the hamartoma and should be reported. On the other hand, although hamartomas are benign, coincidental malignancy can occur, thus, adequate sampling of mammary hamartoma is essential. Mammary hamartomas are uncommon benign lesions that are probably underestimated because of lacking of specific diagnostic criteria. Correlation with the imaging findings and clinical impression is necessary to retain this diagnosis. The treatment is surgical lumpectomy and the prognosis is good