Intraspinal migration of a rectal foreign body.

This is a description of a rare case of intraspinal foreign body, a clinical thermometer bulb, which after perforating the rectum migrated through the second left sacral foramina and sacral canal up to the epidural space at S1-L5 level. A first attempt to remove it by laparotomy while it was still in the retrorectal space proved unsuccessful. Retrieval was finally achieved by laminectomy.