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Monozygotic twins with congenital guttate leukoderma
Kazuyoshi Fukai1, Atsuko Kadoya, Hiroyuki Teramae
1Department of Dermatology, Osaka City University, Graduate School of Medicine, Japan. fukai@msic.med.osaka-cu.ac.jp
Osaka City Medical Journal
|December 13, 2005
Summary
Congenital guttate hypomelanotic macules, a rare skin condition, were observed in identical twins. This unique presentation in both twins suggests a potential new clinical entity for dermatological research.
Area of Science:
- Dermatology
- Genetics
- Pediatrics
Background:
- Congenital guttate hypomelanotic macules are characterized by discrete depigmented skin regions.
- The condition's occurrence in monozygotic twins presents a unique research opportunity.
Observation:
- Two cases of congenital guttate hypomelanotic macules in monozygotic twins are presented.
- Lesions were noted since birth in the axillae, inguinal region, and lower abdomen, with no changes up to age nine.
- Patient development was otherwise normal.
Findings:
- Split-DOPA testing showed an absence of DOPA-positive melanocytes in affected skin.
- Electron microscopy revealed a decreased number of regular melanocytes.
- Cytogenetic analysis confirmed a normal female karyotype in both twins.
Implications:
- The distinct pattern in monozygotic twins suggests a possible genetic basis or a novel clinical entity.
- Further research is warranted to understand the etiology and pathogenesis of this condition.
- This case study contributes to the understanding of rare congenital pigmentary disorders.