Large bowel obstruction from advanced prostate cancer in a 41-year-old: the role of genetic testing.

We report a rare presentation of an advanced prostate cancer (Gleason 10) in a 41-year-old man with complete large bowel obstruction relieved by loop colostomy. His young age prompted a search for a cause and genetic testing confirmed chromosome 10 PTEN deletion. His immediate family members were screened and counselled appropriately.