Imperforate anus is a defect in which the opening to the anus is missing or blocked. The anus is the opening to the rectum through which stools leave the body. This is present from birth congenital. It is caused by abnormal development of the fetus. Many forms of imperforate anus occur with other birth defects. A health care provider can diagnose this condition during a physical exam.
Anorectal Malformations or Imperforate Anus
Anorectal Malformations / Imperforate Anus in Children | Types, Diagnosis & Repair
They occur in an estimated 1 in 4, newborns and can range from mild to complex. Anorectal malformations, including imperforate anus, can affect male and female babies in different ways. In boys, the main anorectal malformations are perineal fistula, rectobulbarurethral fistula, rectoprostatic fistula and rectobladderneck fistula. In girls, the main anorectal malformations are rectoperineal fistula, rectovestibular fistula and cloaca. Anorectal malformations can be complex issues.
This is an "umbrella term" for a group of birth defects which affect the anorectal area. During a normal bowel movement, solid waste passes from the colon large intestine to the rectum the final section the colon and through the anus. When a child has an ARM, the rectum and the anus do not develop properly.
An imperforate anus or anorectal malformations ARMs are birth defects in which the rectum is malformed. ARMs are a spectrum of different congenital anomalies which vary from fairly minor lesions to complex anomalies. There are other forms of anorectal malformations though imperforate anus is most common. Other variants include anterior ectopic anus. There are several forms of imperforate anus and anorectal malformations.