Giant pseudoangiomatous interstitial hyperplasia in adolescent breast: A case report based on imaging findings

Background: this pseudoangiomatous stromal hyperplasia (pash), a rare benign breast tumor, manifests as a fissured pseudovascular cavity formed by interstitial hyperplasia. imaging often presents it as a nodular or non-mass-type lesion associated with other benign lesions. clinical detection of pash generally reveals a rare mass type. materials and methods: we report a case of a 13-year-old girl with a rapidly growing circumscribed mass in her unilateral breast. mammography of the breast revealed a high-density mass without calcification; color doppler ultrasound showed a low echo with arterial blood flow; magnetic resonance imaging (mri) suggested that the mass was heterogeneous; diffusion-weighted imaging (dwi) results indicated a slightly high signal; t2-weighted imaging (t2wi) high-signal components showed a fissure without enhancement; and the time-signal intensity curve of solid components displayed a type i curve. patient underwent surgical treatment, whereupon pathological results indicated pash. conclusion: pash presents as a rapidly growing borderline mass without calcification in a unilateral breast. comparative analyses of the imaging characteristics of multiple mr sequences show significant enhancement of the low-signal area in t2wi results.