Becker nevus syndrome is the association of Becker's nevus with breast hypoplasia and other ipsilateral bone or muscle changes. It is considered to be a hormone-dependent disorder caused by a disturbance in the activity of the androgen receptor that appears to be increased in Becker's nevus, which may influence the development of associated lesions. We present a relevant case of this syndrome due to the rare systematization of the lesions in addition to the exuberant extracutaneous involvement in this case.

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Mal de Meleda is a rare transgressive palmoplantar keratoderma with an estimated prevalence of 1 in 100,000 individuals. It was first described in 1826 by Stulli on the island of Mljet. Its autosomal recessive inheritance was described in 1938, and the defective gene was localized to chromosome 8 qter in 1998. Clinical features are the result of abnormal palmoplantar keratinization and include severe symmetrical transgressive hyperkeratosis and erythema of the feet and hands in a glove-and-sock pattern. Genetic counseling is mandatory in cases of consanguinity. We report two cases of familial occurrence in the offspring of consanguineous parents.

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