What are the key clinical features to consider when diagnosing Hirschsprung's disease in infants?

Guideline-aligned answer with reasoning, red flags and references. Clinically reviewed by Dr Kola Tytler MBBS CertHE MBA MRCGP.

Posted: 22 August 2025Updated: 22 August 2025 Guideline-Aligned (High Confidence) Clinically Reviewed
Dr Kola Tytler MBBS CertHE MBA MRCGPClinical Lead • iatroX

Key clinical features to consider when diagnosing Hirschsprung's disease in infants include:

  • Delayed passage of meconium beyond 48 hours after birth, which is a hallmark early sign raising suspicion for Hirschsprung's disease .
  • Chronic constipation or failure to pass stools, often accompanied by abdominal distension and vomiting, indicating bowel obstruction .
  • Palpable abdominal distension and a tight, empty rectum on digital rectal examination, which may produce explosive release of stool and gas upon withdrawal, known as the "squirt sign" .
  • Signs of enterocolitis such as fever, diarrhea, and lethargy, which can complicate the disease and require urgent attention .
  • Failure to thrive or poor weight gain due to chronic bowel dysfunction .
  • In some cases, a family history of Hirschsprung's disease or associated syndromes (e.g., Down syndrome) may be present, supporting the diagnosis .

These clinical features, combined with diagnostic investigations, guide the diagnosis of Hirschsprung's disease in infants .

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