Pseudo-angiomatous stromal hyperpla

Pseudo-angiomatous stromal hyperplasia (PASH) is a rare and benign breast lesion belonging to an informal group of benign stromal lesions, which includes nodular fasciitis, myofibroblastomas, solitary fibrous tumors, and others. Pseudo-angiomatous stromal hyperplasia can be a difficult differential diagnosis at times, because the radiological appearance of the lesion mimics that of breast fibroadenoma, and histological-microscopic features can be confused with low-grade angiosarcoma.