VACTERL Association

Overview

VACTERL association is a term used when a baby is born with a particular combination of structural differences affecting several body systems. The name is an acronym for the body areas commonly involved: Vertebral (spine), Anal (anus), Cardiac (heart), Tracheo-Esophageal (windpipe and food pipe), Renal (kidneys), and Limb (arms and hands).

The word "association" is used because these features occur together more often than would be expected by chance, but they do not all stem from a single known cause. A diagnosis is usually made when a child has at least three of the core features. The specific combination and severity vary widely from one child to another, so care is highly individualized.

Symptoms

VACTERL association can include any combination of the following features:

• Vertebral differences: Abnormally shaped or missing spinal bones, sometimes with curvature of the spine.
• Anal differences: An imperforate or malformed anus, which may block the passage of stool.
• Cardiac differences: Various heart defects, ranging from mild to serious.
• Tracheo-esophageal differences: An abnormal connection between the windpipe and food pipe, or a gap in the food pipe, affecting feeding and breathing.
• Renal differences: Missing, malformed, or misplaced kidneys, or urinary tract problems.
• Limb differences: Most often involving the thumbs or forearms.

Children usually have normal intelligence. Symptoms depend on which systems are affected and how severely.

Causes

The exact cause of VACTERL association is not known. It is thought to arise from disruptions in early embryonic development, when many organ systems are forming around the same time. Most cases occur sporadically, meaning there is no clear family history.

VACTERL is generally not linked to a single gene, and standard genetic tests are usually normal. However, doctors often test for and rule out other conditions that can look similar, because the combination of features overlaps with several genetic and chromosomal disorders. Maternal diabetes has been noted as one factor that may increase the risk in some pregnancies.

Risk Factors

• Maternal diabetes during pregnancy in some cases
• Most cases occur sporadically without identifiable risk factors
• VACTERL is generally not inherited in a predictable pattern

Because the cause is largely unknown, there is usually no specific behavior or exposure that explains why it occurs.

Diagnosis

VACTERL association is diagnosed clinically, based on finding several of the characteristic features together. The evaluation typically includes:

• Physical examination: Checking the limbs, anus, and spine for visible differences.
• Imaging: X-rays of the spine and limbs, echocardiogram for the heart, ultrasound of the kidneys, and studies of the food pipe and windpipe.
• Ruling out other conditions: Genetic and chromosomal testing to exclude syndromes that share similar features.

Some features may be detected before birth on prenatal ultrasound, prompting closer monitoring and planning for care after delivery.

Treatment

There is no single treatment for VACTERL association; care is directed at each affected system and is usually coordinated by a team of specialists. Treatment may include:

• Surgery: Often needed in the newborn period to repair the food pipe, anus, heart, or other structures.
• Ongoing monitoring: Regular checks of the heart, kidneys, spine, and growth.
• Supportive care: Feeding support, treatment of urinary or bowel problems, and physical or occupational therapy for limb differences.
• Long-term follow-up: Many children need staged surgeries and continued care into adulthood.

With appropriate treatment, many children do well, and intelligence is typically unaffected.

When to See a Doctor

VACTERL association is usually identified at or before birth, and affected children are cared for by a team of specialists. Parents should maintain regular follow-up visits to monitor the heart, kidneys, spine, and growth.

Seek prompt or emergency care if a child shows:

• Difficulty breathing, choking, or turning blue with feeding
• Inability to pass stool, a swollen abdomen, or persistent vomiting
• Signs of a urinary or kidney problem, such as little urine output or fever
• Feeding difficulties or poor weight gain

Related Topics

Frequently Asked Questions

References

1. National Institutes of Health (NIH), Genetic and Rare Diseases Information Center (GARD).
2. MedlinePlus, U.S. National Library of Medicine.
3. Cleveland Clinic. VACTERL Association.
4. National Organization for Rare Disorders (NORD).