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Becker nevus syndrome

R Happle1, R J Koopman

  • 1Department of Dermatology, Philipp University, Marburg, Germany.

American Journal of Medical Genetics
|January 31, 1997
PubMed
Summary
This summary is machine-generated.

Becker nevus syndrome is a newly proposed term for a phenotype including hyperpigmentation, hair growth, smooth muscle tumors, and developmental defects. This review covers 23 sporadic cases, suggesting a common origin from early mutations.

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Area of Science:

  • Dermatology
  • Medical Genetics
  • Developmental Biology

Background:

  • Becker nevus is a congenital skin anomaly.
  • Associated developmental defects are recognized but not consistently classified.
  • A unifying syndrome designation is lacking.

Purpose of the Study:

  • To propose and define a new syndrome: Becker nevus syndrome.
  • To review and categorize existing cases fitting this phenotype.
  • To explore the potential etiology of the associated anomalies.

Main Methods:

  • Literature review of 23 reported cases.
  • Phenotypic analysis of nevus characteristics and associated anomalies.
  • Correlation of anomaly patterns with potential developmental origins.

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Main Results:

  • A distinct phenotype characterized by organoid epithelial nevus (hyperpigmentation, hypertrichosis, smooth muscle hamartoma) and ipsilateral developmental defects (hypoplastic breast, skeletal anomalies like scoliosis, spina bifida occulta, limb hypoplasia) is identified.
  • The 23 reviewed cases fit this proposed Becker nevus syndrome designation.
  • The syndrome typically occurs sporadically.
  • Associated anomalies often show regional correspondence.

Conclusions:

  • Becker nevus syndrome is a valid clinical entity.
  • The regional correspondence of anomalies suggests a common origin from an early postzygotic mutation.
  • Further research into the genetic and developmental basis is warranted.