Pseudoangiomatous Stromal Hyperplasia Of The Breast

Pseudoangiomatous stromal hyperplasia is a benign proliferative lesion of the mammary stroma that rarely presents as a localized mass. We describe the clinical, radiologic, cytologic, and histologic features of a case of pseudoangiomatous stromal hyperplasia that presented as a rapidly growing breast lesion in a 36-year-old woman.