Linear hypopigmentation and hyperpigmentation, including mosaicism.

C A Loomis

doi:10.1016/s1085-5629(97)80035-1

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Linear hypopigmentation and hyperpigmentation, including mosaicism.

C A Loomis

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Abstract

Linear streaks of hypopigmentation or hyperpigmentation along Blaschko's lines are currently grouped under the names hypomelanosis of Ito (HI) and linear and whorled hypermelanosis (LWH). Recent studies have suggested that these linear pigmentary anomalies reflect underlying genetic mosaicism. Mosaic individuals are composed of two or more genetically distinct cell populations, a normal and an abnormal population. In HI and LWH, the types of genetic defects that are detectable in the abnormal population are highly variable, including tetraploidy, partial or complete trisomies, translocations, and point mutations. These results, together with recent studies indicating the incidence of extracutaneous anomalies is lower in HI but higher in LWH than previously estimated, have important clinical implications. The need for a revised nomenclature as well as possible modifications in current recommendations for patient management are discussed.

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Humans Hyperpigmentation Hypopigmentation Incidence Melanosis Mosaicism Pigmentation Disorders Point Mutation Polyploidy Skin Terminology as Topic Translocation, Genetic Trisomy Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S.Review

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C A Loomis. 1997. Linear hypopigmentation and hyperpigmentation, including mosaicism.. https://doi.org/10.1016/s1085-5629(97)80035-1

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