John Libbey Eurotext




Melorheostosis with ipsilateral nevus sebaceus (didymosis melorheosebacea)
European Journal of Dermatology. Volume 13, Number 1, 21-4, January - February 2003, Gènes et peau
Free Article
Author(s) : Sigrid TINSCHERT, Anette STEIN, Burkhard GÖLDNER, Manfred DIETEL, Rudolf HAPPLE
Summary : We report an unusual case of unilateral melorheostosis and ipsilateral extensive sebaceous nevus. Because the two conditions affected the same side of the body, we hypothesize that they originated from a common genetic mechanism. The temporal and spatial co-occurrence may represent a further example of non-allelic didymosis (twin spotting). The embryo would carry two different recessive mutations at one gene locus or at linked loci on either of a pair of homologous chromosomes. Postzygotic recombination occurring during early embryonic development would result in two different populations of cells homozygous for either mutation. If this concept holds true, the present case may be described as " didymosis melorheosebacea ".
Keywords : melorheostosis, nevus sebaceus, postzygotic mutation, twin spotting, didymosis melorheosebacea

Melorheostosis with ipsilateral nevus sebaceus (didymosis melorheosebacea)