Nodular myofibroblastic stromal hyperplasia of the mammary gland as an accurate name for pseudoangiomatous stromal hyperplasia of the mammary gland.

Pseudoangiomatous stromal hyperplasia (PASH) of the mammary gland is a well-known benign localized form of stromal overgrowth with probable hormonal etiology. We describe the histologic findings and immunohistochemistry of two cases. Two women, 16 and 58 years old, presented with a breast mass and underwent surgical excision.