Giant Pseudoangiomatous Stromal Hyperplasia of the Adolescent Breast: A Case Report with Emphasis on Image Findings and Literature Review

Pseudoangiomatous stromal hyperplasia (PASH) is a rare benign mesenchymal proliferation of the breast with unclear etiology. It is diagnosed in a wide spectrum from incidental microscopic findings to palpable breast mass. Diagnosis is generally made in the premenopausal age group. PASH cases seen in adolescents reported in the literature are very rare and none of them has mentioned the radiologic features in detail. In this case report, we present a 12-year-old patient with giant (150x100x127 mm in size) PASH in her right breast, giving emphasis to the findings of the ultrasonography and magnetic resonance imaging, including contrast-enhanced dynamic and diffusion-weighted imaging sequences. To the best of our knowledge, the present case is the second biggest giant PASH seen in the adolescent age.