J Korean Soc Neonatol.  2006 May;13(1):194-198.

A Case of Congenital Myotonic Dystrophy Diagnosed by Molecular Genetics

Affiliations
  • 1Department of Pediatrics, College of Medicine Chosun University, Gwangju, Korea. skpark@chosun.ac.kr
  • 2Department of Obstetrics and Gynecology, College of Medicine Chosun University, Gwangju, Korea.
  • 3Department of Pathology, College of Medicine Chosun University, Gwangju, Korea.

Abstract

Congenital myotonic dystrophy is a progressive degenerative disease of the neuromuscular system, usually inherited in an autosomal dominant fashion. Affected infant presents with varying degrees of respiratory failure, often necessitating immediate and prolonged ventilatory assistance. An expression of a CTG (cystosine-thymine-guanine) repeat in the 3'-unsaturated region of a protein kinase gene contributes to the development of myotonic dystrophy. We experienced a case of congenital myotonic dystrophy in a male neonate with respiratory difficulty, hypotonia and difficulty in sucking and swallowing. His mother had mild manifestations of adult type myotonic dystrophy. PCR analysis revealed that CTG repeats in the myotonic dystrophy gene of the neonate and the mother were about 800 and 100 respectively.

Keyword

Congenital myotonic dystrophy; CTG repeat; Neonate

MeSH Terms

Adult
Deglutition
Humans
Infant
Infant, Newborn
Male
Molecular Biology*
Mothers
Muscle Hypotonia
Myotonic Dystrophy*
Polymerase Chain Reaction
Protein Kinases
Respiratory Insufficiency
Protein Kinases
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