Hyperplasie pseudoangiomateuse du stroma mammaire nodulaire chez une jeune femme de 19Â ans

Pseudoangiomatous stromal hyperplasia (PASH) is an uncommon benign breast disease, characterized by interanastomosing slit-like spaces lined with spindle-shaped cells in a collagenous stroma; it is most commonly seen in premenopausal women. This disease is a frequent incidental microscopic finding in breast biopsies. It may be symptomatic and appears then as a palpable lump. The authors report a case of a 19-year-old girl with a palpable nodule in the right breast, which mimicked clinically and radiologically a fibroadenoma. PASH should be distinguished from angiosarcoma in a daily practice. It is ruled out by immunohistochemistry. They discuss in this work the clinical presentation, radiological and pathological features of this unusual condition.