Anorectal Malformations

What are Anorectal Malformations?

Anorectal malformations are a group of birth defects than involve the external opening of the anus preventing the normal passage of stool. The anal opening may be smaller than normal size; in an abnormal location or not visible upon examination.

There are many types of anorectal malformations. Some of the more common types include:

Anal Stenosis/Atresia – a narrowing or complete absence (closure) of the anal opening.

Anoperineal/Rectoperineal fistula – a small tube-like opening that creates an abnormal passageway between the colon and the anal opening.

Ectopic Anus – an anal opening that is not in the normal place.

Perineal anus – an anal opening within the perineum.

Imperforate anus – the anal opening is completely closed or narrowed to only a small passage. A complete imperforate anus is often associated with atresia of the lower rectum.

“high type” – the rectum ends above pelvic nerve and muscle structures.

“low type” – the rectum extends completely or partially through the pelvic nerve and muscle structures.

Please fill in your information to download the full fact sheet. Fact Sheets are free, and your information helps us receive more funding for our research.

All fields are required to download the full fact sheet.

Your Name

Your Email

Your Street Address

Your City/Town and State

Your Zip

Click submit for the download link.

Comments are closed