[Metastasis of prostate carcinoma to the lamina submucosa of the distal rectum in ulcerative colitis 2 years after transrectal prostate biopsy and radical prostatovesiculectomy].

Transrectal ultrasound-guided prostate biopsy is the standard technique to detect prostate cancer histologically. Based on a few case reports, it is known that prostate biopsy can cause a seeding of tumor cells. We report the case of a 64-year-old man who 2 years after radical prostatectomy for prostate cancer underwent proctocolectomy because of ulcerative pancolitis. In the lamina submucosa of the distal rectum a micrometastasis of the prostate cancer was found. A possible reason for this metastasis is an implantation of prostate cancer cells due to the transrectal biopsy of the prostate.