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Related Experiment Videos

Cutaneous leiomyomatosis with type 2 segmental involvement.

G Tsoitis1, J Kanitakis, C Papadimitriou

  • 1Department of Dermatology, Ed. Herriot Hospital, 69437 Lyon cx 03, France.

The Journal of Dermatology
|July 5, 2001
PubMed
Summary

Diffuse cutaneous leiomyomatosis, a rare skin condition, presented unusually in a young man with segmental lesions. Genetic loss of heterozygosity offers a plausible explanation for this rare presentation.

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Area of Science:

  • Dermatology
  • Genetics
  • Oncology

Background:

  • Diffuse cutaneous leiomyomatosis (DCL) is a rare genodermatosis.
  • DCL is characterized by multiple piloleiomyomas on the skin.
  • DCL is associated with an increased risk of uterine and other leiomyosarcomas.

Observation:

  • A 21-year-old man presented with histologically confirmed DCL.
  • The lesions exhibited a peculiar segmental distribution predominantly on the right side of his body.
  • Less extensive, nonsegmental lesions were also present bilaterally.

Findings:

  • The case was sporadic, with no family history of DCL.
  • The unusual segmental presentation is explained by the genetic mechanism of loss of heterozygosity.
  • A postzygotic loss of heterozygosity event in a heterozygous individual could lead to type 2 segmental DCL.

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Implications:

  • This case highlights the importance of considering genetic mechanisms in atypical presentations of DCL.
  • Understanding loss of heterozygosity in DCL can aid in diagnosis and genetic counseling.
  • Further research into the genetic underpinnings of DCL may reveal new therapeutic targets.