BACKGROUND: Lichen nitidus is a rare condition, which may be a cause of palmoplantar hyperkeratosis. We report two cases. CASE REPORTS: A 53 year-old woman presented with a dry and fissured palmoplantar hyperkeratosis. Histological examination of a biopsy showed the typical features of lichen nitidus. Significant improvement was obtained with acitretin. A few months later, multiple lichen nitidus papules appeared on the limbs and the abdomen. A 67 year-old woman was referred to us for a fissured, disabling palmoplantar hyperkeratosis refractory to topical steroids. Histological examination led to the diagnosis of lichen nitidus. Local PUVA therapy resulted in the cleaning of her lesions. Later, typical papules of lichen nitidus appeared on her elbows. DISCUSSION: Nineteen cases of palmoplantar localization of lichen nitidus have been described. The features are usually tiny yellow papules but sometimes a non-specific keratoderma resembling chronic eczema. Palmoplantar involvement of lichen nitidus may be isolated or associated with cutaneous lesions on unusual sites. Oral retinoids and local PUVA are effective treatments.

Administration, Topical↗

PubMedDate not supplied

[Baso-cellular nevomatosis in 2 twins].

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Adolescent↗

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[Congenital or acquired unilateral nevoid stellar telangiectasias. About 5 cases (author's transl)].

Based on five personal cases (one neo-natal case, one in childhood, and three cases in pregnant women) and sixteen published cases, this study remind us of the essential caracteristics of unilateral nevoid telangiectasis. Prevalence in women is noticeable appearance during pregnancy, with complete regression during post-partum, is quasi constant. If their nosological place is not clear among the essential telangiectasias, they seem to be quite different from Hutchinson's serpiginious angioma (verrucous telangiectasis), from Osler-Rendu's disease, from Brocq's telangiectasias and from generalizated telangiectasias. The true signification of all these diseases is still completely unknown.

Adult↗