Prostate Stromal Tumor of Uncertain Malignant Potential

**Semantic type:** Neoplastic Process

**Definition:** A neoplastic lesion that arises from the prostate gland stroma. Morphologic characteristics include hypercellular stroma with scattered atypical cells, prominent overgrowth of the prostatic stroma, or changes resembling benign phyllodes tumor. The majority of cases do not have an aggressive clinical course. A minority of cases however, may progress to stromal sarcoma.

**Synonyms:** - Prostate Stromal Proliferation of Uncertain Malignant Potential - Prostatic Stromal Tumor of Uncertain Malignant Potential - STUMP