Nail Psoriasis: A Systematic Evaluation in 313 Children with Psoriasis.

Background/objectives: Little information is available on the prevalence and clinical aspects of nail involvement in children with psoriasis. The objective of this study was to evaluate the prevalence and clinical aspects of and the risk factors for nail involvement in French children with psoriasis.

Methods: We performed a multicenter, cross-sectional study in 23 French dermatology centers.

Melanocyte stimulation in focal dermal hypoplasia with unusual pigmented skin lesions: a histologic and immunohistochemical study.

Focal dermal hypoplasia (FDH) or Goltz syndrome is a rare genodermatosis transmitted in a dominant, X-linked mode. It is characterized clinically by atrophic skin lesions, multiple mucocutaneous papillomas, hyperpigmented linear skin lesions, and several skeletal and visceral anomalies. We followed over several years a female patient with FDH, who had the characteristic atrophic cutaneous lesions and periorificial papillomas, who developed at the periphery of atrophic lesions peculiar lentigo-like pigmented macules.