A five-year-old boy with a rectal mass mimicking a rectal polyp, which proved to be a cystic duplication of the rectum, is presented. In a child with painless rectal bleeding, a mass palpated during rectal examination is usually diagnosed initially as being a rectal polyp. However, the case presented revealed the possibility of rectal duplication.

Keywords: rectal duplications, intestinal duplication, anal bleeding, rectal polyp