[New mutations associated with Hirschsprung disease]

Area of Science:

• Genetics
• Developmental Biology
• Gastroenterology

Background:

• Hirschsprung disease results from failed neural crest cell migration to the gut, causing aganglionosis.
• Multiple gene mutations are implicated, predominantly affecting the RET proto-oncogene pathway.
• Understanding these genetic underpinnings is crucial for diagnosing and managing Hirschsprung disease.

Purpose of the Study:

• To identify and characterize novel and known genetic mutations associated with Hirschsprung disease.
• To investigate the prognostic implications of these identified mutations.
• To contribute to the genetic work-up of Hirschsprung disease patients.

Main Methods:

• Retrospective analysis of patients diagnosed with Hirschsprung disease.
• Inclusion of individuals with positive genetic studies from 1970 to 2013.
• Focus on genetic mutation identification and characterization.

Main Results:

• Twenty-one positive genetic studies were identified in the patient cohort.
• Seventeen of these studies implicated the RET proto-oncogene.
• Two novel mutations, previously unreported, were discovered.

Conclusions:

• The RET proto-oncogene is the primary genetic factor in Hirschsprung disease.
• Numerous unknown mutations likely contribute to the disease's pathogenesis.
• Genetic testing for RET mutations is recommended for all Hirschsprung disease patients and their relatives, especially if associated with MEN2A/MEN2B syndromes.