Prostatic stromal proliferation of uncertain malignant potential (PSPUMP): a case report.

Proliferative lesions of specialized prostatic stroma are rare with only few isolated case reports documented in literature. These lesions are histologically characterized by exuberant proliferation of prostatic stroma with variable number of normal and hyperplastic glands. Recently this group of tumors have been labeled as prostatic stromal proliferations of uncertain malignant potential (PSPUMP). We report a case of PSPUMP in a 72 years old male who underwent radical prostatectomy for a mass in pelvis. Based on histological appearance and immunohistochemistry, a diagnosis ofPSPUMP was made.