STUMP
Section Editor: Dharam M. Ramnani, MD
Virginia Urology, Richmond, VA, USA
Image Description
Prostatic stromal tumors of uncertain malignant potential (STUMPs) generally arise in older men who usually present with obstructive urinary symptoms. The most common histologic pattern (approx. 50% of cases) consists of highly pleomorphic cells with degenerative type atypia scattered among benign prostatic glands. Other patterns include phyllodes tumor-like growth, hypercellular stroma without atypical cells, and myxoid stroma.