label: Mammary-Type Myofibroblastoma
label_lc: mammary-type myofibroblastoma
description: A benign mesenchymal neoplasm characterized by the presence of spindle shaped myofibroblasts and mast cells in a collagenous stroma.  It is histologically identical to the myofibroblastoma of breast.  It usually arises from the subcutaneous tissue and the most common sites of involvement are the inguinal/groin, paratesticular, and vulvovaginal areas.