Gu et al. (2003) described a form of epidermolysis bullosa simplex that was milder than the Dowling-Meara phenotype (131760) but involved an unusual migratory circinate erythema with multiple vesicles on the area affected by the erythema. The lesions, ... Gu et al. (2003) described a form of epidermolysis bullosa simplex that was milder than the Dowling-Meara phenotype (131760) but involved an unusual migratory circinate erythema with multiple vesicles on the area affected by the erythema. The lesions, which appeared from birth primarily on the hands, feet, and legs but spared the nails, ocular epithelia, and mucosae, healed with brown pigmentation but no scarring. Electron microscopy findings were distinct from those seen in the Dowling-Meara type of EBS, with no evidence of tonofilament clumping.
In an affected Japanese girl and affected members of an unrelated Korean family, Gu et al. (2003) identified heterozygosity for a 1649delG mutation in the KRT5 gene (148040.0017). The mutation was assumed to have arisen de novo in ... In an affected Japanese girl and affected members of an unrelated Korean family, Gu et al. (2003) identified heterozygosity for a 1649delG mutation in the KRT5 gene (148040.0017). The mutation was assumed to have arisen de novo in the Japanese girl. When a younger sister with EBS was born and was found to have the same 1649delG mutation as her older sib, Nagao-Watanabe et al. (2004) reinvestigated the familial segregation of the mutation and identified heterozygosity for the deletion in the mother's DNA from hair bulb and buccal cell samples. Closer scrutiny of the mother's history revealed that she had migratory circinate pigmentation of the skin in childhood, and Nagao-Watanabe et al. (2004) concluded that this represented maternal somatic and germline mosaicism.