Anorectal Malformation in Children – Causes, Symptoms & Treatment
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Anorectal Malformation in Children – A Parent’s Guide

What is Anorectal Malformation?

Anorectal malformation (ARM) is a condition that a baby is born with. In this condition, the anus (the opening where stool comes out) and the rectum (the last part of the large intestine) do not form in the normal way. Because of this problem, the baby may not be able to pass stool normally. The opening where stool comes out may be very small, closed, or not in the right place. In some babies, the rectum may be connected to the wrong body part (urinary system) instead of opening in the normal place.

Early treatment is very important. If it is not treated in time, it can cause blockage in the intestines and serious infections. Most babies need surgery soon after birth. With proper treatment, most children grow up healthy and do very well

Why Does Anorectal Malformation Happen?

Anorectal malformation (ARM) happens while a baby is still growing inside the mother’s womb. In the early weeks of pregnancy (around 7–10 weeks), the lower part of the baby’s digestive system is forming. During this time, the rectum and anus separate from the urinary system and develop into their normal positions. If this process does not happen properly, the anus or rectum may not form in the usual way. The opening may be missing, too small, or in the wrong place.

In most cases, doctors do not know the exact cause. It is important to understand that ARM is not caused by anything the mother did or did not do during pregnancy. Sometimes, ARM can occur along with other birth conditions such as:

  • ♦ Down syndrome
  • ♦ Kidney or urinary problems
  • ♦ Spine or bone differences
  • ♦ VACTERL association (a condition that can affect the spine, heart, kidneys, and limbs)
  • ♦ Townes-Brocks syndrome

ARM is slightly more common in boys. In very rare cases, it can run in families. It’s important to know that this condition develops early in pregnancy and is not caused by anything parents did. With early treatment and proper medical care, many children with ARM grow up to live healthy, normal lives.

Signs and Symptoms of Anorectal Malformation (ARM)

In Newborn Babies:

  • ♦  The baby does not pass their first stool within the first 1–2 days after birth
  • ♦ The anus is missing, very small, or in the wrong place
  • The baby’s tummy looks swollen
  • Vomiting, sometimes green in color
  • Stool coming out from the wrong place, such as near the urine opening or vagina
  • ♦ In rare cases, urine may come out from the anus

In Older Babies or Children

  • ♦ Constant constipation
  • Difficulty passing stool
  • Stomach or belly pain

If you notice any of these signs, it’s important to see a doctor quickly. Early treatment can prevent problems and help your child grow up healthy.

How is Anorectal Malformation Diagnosed?

Anorectal Malformation (ARM) is usually diagnosed soon after a baby is born, especially in hospitals that provide specialized children’s care in Rawalpindi and Islamabad.

  1. 1. Physical Examination

The first step is a careful check by a pediatrician, neonatologist or pediatric surgeon. The doctor examines the baby to see:

  •      If the anus is missing
  •       If the opening is very small
  •       If it is in the wrong place

If the baby does not pass stool within the first 24–48 hours after birth, this is also an important warning sign.

  1. 2. Imaging Tests

If ARM is suspected, doctors may recommend a few simple tests to understand the condition better, such as:

  •       X-ray to see how the lower intestine has developed
  •       Ultrasound to check the kidneys, bladder, or spine

These tests help doctors clearly understand the problem and plan the most suitable treatment for your child.

Early diagnosis is very important. With timely care from experienced pediatric specialists in Rawalpindi and Islamabad, babies with ARM can receive proper treatment and go on to live healthy lives.

Treatment Options for Anorectal Malformation

At Kids Care, the main treatment for ARM is surgery, tailored to the severity of the condition. Our pediatric surgical team creates a safe, personalized plan for each child.

1 Single stage surgery:

Primary Anoplasty or Ano-rectoplasty: For mild cases or those who have abnormal opening at perineum or vestibule ( just behind vagina) , the surgeon corrects or creates the anal opening at proper position in a single surgery so the child can pass stool normally.

 Three stage Surgery:

  1. ♦ Colostomy (Temporary Opening for stool on abdomen): In complex cases, especially in males and those with absent anal opening, a large gut is brought out on the abdomen as opening in order to allow stool to pass thus relieving obstruction. This surgery is usually performed on the second day of life.
  2. ♦ Posterior Saggital Anorectoplasty (PSARP): Later, the rectum is connected to the anus in the correct position. If an abnormal connection of rectum is present with the urinary system, it is also corrected during this stage. This surgery is usually performed between 4-6 months of life.
  3. ♦ Colostomy Closure: The temporary opening is closed once healing is complete. This surgery is performed after 6 weeks of PSARP.

With modern care and follow-up, most children recover well and grow up healthy and active.

2 Care after Surgery & Recovery

After surgery, parents are given simple guidance to help their child heal comfortably:

  • Keep the area clean to prevent infection
  • Watch bowel movements and manage diet to ensure proper healing
  • Attend follow-up visits with the pediatric specialist in Rawalpindi or Islamabad

With careful care and regular check-ups, most children recover well, achieve normal bowel function, and enjoy a healthy, active life.

When Should Parents See a Doctor?

Parents should contact a doctor right away if their newborn shows any of these signs:

  • Has not passed stool within the first 1–2 days after birth – this can be an early sign of ARM or another blockage.
  • Swollen tummy or vomiting – the baby’s abdomen may look bloated, or they may vomit, sometimes with greenish fluid.
  •  Abnormal bowel movements or stool leaking – stool coming out from the wrong place, like near the urinary opening or vagina, is a warning sign.

Early medical attention is very important. Prompt evaluation by a pediatric specialist can help diagnose the problem quickly and start treatment, giving your baby the best chance for a healthy recovery.

Frequently Asked Questions

What are Pediatric Anorectal Malformations?

Pediatric anorectal malformations are birth defects that affect the anus and rectum in babies. These problems can make it difficult for a child to pass stool normally.

Doctors usually notice anorectal malformation when a baby is born and examined. They might see that the anus is very small, missing, or in the wrong place.

Children may have trouble controlling stool, experience accidental leakage, diarrhea, pain or burning during bowel movements, and sometimes bleeding or inflammation.

Doctors perform simple and gentle tests to understand your child’s condition. They carefully examine the baby and may use X-rays or ultrasound to see inside the body. These painless tests help doctors identify the problem and choose the best treatment for your child.

Most babies need surgery to fix the anus and rectum. The exact type and timing depend on how serious the problem is. Treating early usually gives the best results.

These are types of anorectal malformations where the rectum connects to the wrong place. In boys, stool may pass with urine (recto-urethral). In girls, stool may come out through the abnormal opening just behind the vaginal area (recto-vestibular). Both need surgery to restore normal bowel function. If stool comes out of vagina then it is recto-vaginal fistula.

Yes! After surgery and proper care, most children grow up healthy and active, able to do everything other kids do. The doctors and hospital team support both you and your child throughout recovery.

Yes, the hospital offers full care—diagnosis, surgery, and follow-up—supporting both the child and parents through every step of recovery.

Most children stay a few days to a week. Doctors keep them until they are healing well, feeding properly, and able to pass stool comfortably.