Anorectal malformation (ARM): It is the situation where the anus is opened to the wrong place outside of the normal. The anus may also be completely closed. It is one of the abnormal developmental anomalies of the baby's organs in the womb. Therefore, when ARM is encountered, other organs should also be examined for abnormal development. For example: cardiovascular anomalies, kidney-bladder disorders, spine and bone anomalies may accompany.

Although the frequency of ARM differs according to the countries, it is generally seen in one in 4500-5000 live births. The frequency is higher in men. Although reasons such as maternal age, number of births, race, and genetics have been suggested, no causative factor has yet been identified.

ARM's are classified according to gender, opening of the anus and additional anomalies. The severity of the disease and additional anomalies are decisive in the treatment process. This condition, which cannot be improved without surgery, has the possibility of close follow-up and additional intervention if necessary after surgery.

Normally, while the anus develops, the muscles and nerves that enable pooping and pooping also develop. For this reason, ARM should not be viewed only as the opening of the anus to an abnormal location. Abnormal development affects the surrounding structures as well as the anus. As a result, although the anus is surgically brought to a normal location, problems with defecation may occur. Therefore, close follow-up should be done after surgery.