Dermatology
Short Communication
Didymosis aplasticosebacea: Coexistence of Aplasia cutis congenita and Nevus sebaceus May Be Explained as a Twin Spot PhenomenonHapple R. · König A.Department of Dermatology, University Hospital Marburg, Germany
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Article / Publication Details
Published online: May 23, 2001
Issue release date: 2001
Number of Print Pages: 3
Number of Figures: 3
Number of Tables: 1
ISSN: 1018-8665 (Print)
eISSN: 1421-9832 (Online)
For additional information: https://www.karger.com/DRM
Abstract
Background: Co-occurrence of aplasia cutis congenita and nevus sebaceus has sometimes been observed. Objective: We propose a genetic mechanism that may explain this coexistence of two different congenital skin disorders. Methods and Results: We review 15 cases as reported in the literature and present an additional case. To explain the temporal and spatial proximity of the two skin lesions we advance the concept of twin spotting for which we propose the term didymosis (Greek didymos = twin). In an embryo heterozygous for two different recessive mutations localized on either of a pair of homologous chromosomes, an event of somatic recombination would occur at an early developmental stage, giving rise to two different cell clones homozygous for either mutation. Conclusion: The concept of didymosis aplasticosebacea is so far hypothetical. Future molecular research may show whether this concept holds true.
© 2001 S. Karger AG, Basel
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Article / Publication Details
Published online: May 23, 2001
Issue release date: 2001
Number of Print Pages: 3
Number of Figures: 3
Number of Tables: 1
ISSN: 1018-8665 (Print)
eISSN: 1421-9832 (Online)
For additional information: https://www.karger.com/DRM
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