[Gastrointestinal stromal tumor (GIST) of the anterior rectal wall. R0 resection with simultaneous radical retropubic prostatectomy].

This case report deals with a 79-year-old patient with a gastrointestinal stromal tumor (GIST) of the anterior rectal wall which was unusually located between the rectum and the prostate gland. In addition, this patient suffered from subvesical obstruction accompanied by an elevated PSA level. These circumstances led to our decision to operate on the tumor via simultaneous radical retropubic prostatectomy. In our opinion this resection technique was easier and less traumatic for the patient compared to procedures performed via the abdomen and perineum. This case report demonstrates that in the case of tumors located between the rectum and the prostate gland the differential diagnosis should include not only prostate carcinoma but also rare tumor entities such as GIST.