Sigmoido-rectal intussusception.

Sigmoido-rectal intussusception is the least common type of intussusception seen in infants and children and is therefore usually misdiagnosed as rectal prolapse. Delay in diagnosis and treatment is due to lack of its awareness amongst surgeons, incomplete assessment of the prolapsed bowel at the anal orifice, and absence of classical traid of intussusception i.e. palpable abdominal mass, colicky abdominal pain, and bleeding per rectum.