Myofibroblastoma of male breast : a case report.

Myofibroblastoma of breast is an extremely rare, benign mesenchymal lesion composed ofmyofibroblasts. Less than seventy cases of this entity are reported in the literature. In spite of the widely varying morphological patterns, there are few characteristic cytological, histopathological, immunohistochemical, and ultrastructural features that permit its accurate identification among a vast group of mammary spindle cell tumours. We present the case ofa 60 year male presenting with a left breast nodule, interpreted as gynaecomastia on cytology. Histopathology however revealed characteristicfeatures of a myofibroblastoma, confirmed by immunohistochemistry.