[Two cases of prostatic stromal tumor of uncertain malignant potential (STUMP) on pathological diagnosis after surgery for benign prostatic hyperplasia].

Prostatic stromal tumor of uncertain malignant potential (STUMP) is a rare neoplasm characterized by an atypical, unique stromal proliferation of the prostate. Two patients consulted our hospital with the complaint of urinary retardation. We performed holmium laser enucleation of the prostate since by digital rectal examination, magnetic resonance imaging and needle biopsy suggested benign prostatic hyperplasia. The pathologic examination of the surgical specimens revealed prostatic STUMP. Urologic and radiologic examinations have revealed no abnormalities after more than 2 years of follow-up.