[Stromal tumor of the prostate of uncertain malignant potential. A diagnostic rarity].

Stromal tumor of the prostate of uncertain malignant potential (STUMP) is an extremely rare entity. The clinical symptoms are nonspecific for this tumor. An abnormal digital rectal examination or an elevated prostate-specific antigen level is possible but not obligatory. The tumor has a high recurrence rate and could develop a sarcomatous dedifferentiation. Therapy varies from a wait-and-see approach to a radical prostatectomy. We report the case of a 74-year-old patient with a STUMP. Based on the case, the clinical, diagnostic, and therapeutic aspects of this rare tumor are discussed.