Total pelvic exenteration and a new model of diversion for giant primitive neuroectodermal tumor of prostate: A case report and review of the literature.

The present study reports a rare primitive neuroectodermal tumor (PNET) of prostate. A 27-year-old male was admitted to Harbin Medical University Cancer Hospital (Harbin, China) for dysuria and dyschezia. Magnetic resonance imaging (MRI) revealed a large mass that may involve the bladder and rectum next to the prostate. Histopathological analysis of biopsy of prostate indicated mesenchymal origin tumor, and immunohistochemistric staining confirmed diagnosis of PNET of prostate. En bloc total pelvic exenteration and double barrel sigmoidostomy were performed. Double stomas in the skin incision were used for fecal and urinary diversion, respectively. Short-term outcome is satisfactory, while long-term efficacy remains to be poor. Clinical features of PNET of prostate should be paid much more attention and radical surgery and adjuvant chemotherapy should be recommended.