MRI Case 22
40 y/o F presents for diagnostic MRI to evaluate a benign left breast mass. What is the most likely diagnosis?
PSEUDOANGIOMATOUS STROMAL HYPERPLASIA (PASH)
- Benign stromal overgrowth; possibly hormonally-driven
- Women of reproductive age
- Mammo: Circumscribed mass or focal asymmetry without calcifications
- US: Hypoechoic or slightly heterogeneous mass
- MRI: Nonspecific, but may present as clumped NME with persistent/plateau kinetics
- Can grow over time; NOT associated with malignancy
Related Radiology Article: Jones KN, Glazebrook KN, Reynolds C. Pseudoangiomatous stromal hyperplasia: imaging findings with pathologic and clinical correlation. American Journal of Roentgenology. 2010 Oct;195(4):1036-42.