Myoid hamartoma of breast clinically masquadering as phyllodes tumor- A rare case report

Mammary hamartoma (MH) is an infrequent form of breast tumor that accounts for approximately 4.8% of all benign breast lesions. Myoid (muscular) hamartomas are uncommon benign breast lesions that are considered to be a variant of mammary hamartomas. Since the pathogenesis of MH is poorly understood, its true incidence is under-reported by clinicians and as well as pathologists.Thus, we report this case of MH in a middle-aged female, who presented with a large breast mass mimicking phyllodes tumor and giant fibroadenoma, however, histopathology and immunohistochemical examination aided its diagnosis as Myoid Hamartoma. We present this case to highlight this rare benign breast lesion.
 

Keywords: Breast, Hamartoma, Myoid, Muscular, Smooth muscle actin.