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Myofibroblastoma is a rare benign mesenchymal tumor of the breast. A small number of cases have been reported in the literature. It is often seen in postmenopausal women and older men. In general, MFP occurs slow-growing within months, well-circumscribed, mobile, single-sided and a hard mass. Due to the variety of morphological variants, it is difficult to distinguish from other breast masses by imaging techniques, tru-cut biopsy plays a key role in diagnosis. Local excision of myofibroblastoma as a benign tumor of the breast is curative. Malign transformation and recurrence after surgery have not been reported. Knowing the right approach to this rare breast mass by general surgeons, reduce unnecessary and mistreatments. We presented a new case of myofibroblastoma which is found in a 42 years old male patient's breast, due to its rarity. [ABSTRACT FROM AUTHOR]

This study aimed presenting a case of a 64-year-old woman with a rare diagnosis of myofibroblastoma (MFB). MFB is one of the rare, benign, spindle-like stromal tumors arising from the connective tissue of the breast. MFBs are often confused with fibroadenomas and hamartomas because of their benign characteristic appearance on breast imaging and are diagnosed after excisional biopsies. Their differential diagnosis with malignant neoplasia of the breast is important because of their wide morphological spectrum. Our case also demonstrated a breast mass with benign imaging characteristics and a needle core biopsy revealing a benign, spindle-like stromal tumor. The pathological examination performed after the excision of the lump demonstrated a collagenous-/fibrous-type MFB. This case report emphasizes the rare but important place of MFB variants of the breast in the differential diagnosis of breast mass. [ABSTRACT FROM AUTHOR]