Seis casos de Tinea nigra diagnosticados no Serviço de Dermatopediatria do Hospital de Clínicas de Curitiba, UFPR, no período entre 1978 e 2001 são descritos. Trata-se de quatro crianças em idade escolar que tiveram contato com areia da praia e dois adolescentes. Em um dos casos as lesões são de localização plantar bilateral, configurando o primeiro desse tipo relatado na literatura nacional.

Indolent leg ulcers are a rare complication found in patients with hereditary spherocytosis. We report a 13-year-old girl with hereditary spherocytosis who developed a chronic painful ulcer on the medial malleolus. All other etiologies were ruled out. Nine months after splenectomy the ulcer healed completely and the symptoms disappeared. We discuss and review this unusual entity in children.

Large congenital melanocytic nevus rarely presents itself without hairs, with hardened skin and progressive depigmentation. We report a girl who presented with a large congenital melanocytic nevus in the left cheek. Over the years, the nevus became pruriginous, light brown, bumpy, and hard. Histology revealed nevus cells interspersed with dense fibrosclerotic collagen bundles. There are few reported cases of large congenital melanocytic nevus with this evolution, so-called desmoplastic hypopigmented hairless nevus.

Abstract:Erythema ab igne is a pigmented reticular skin lesion with telangiectasias caused by prolonged exposure to heat. This report describes the case of a 12-year-old adolescent girl with erythema ab igne induced by a laptop computer. The paper also discusses how computers generate heat and how important it is for the manufacturers of these devices to warn consumers of the potential hazards that could occur if the equipment is misused. Keywords: Computers, Erythema, Radiation EffectsResumo: O eritema ab igne é lesão de pele reticular pigmentada com telangiectasias, causada pela exposição prolongada ao calor. Relatamos o caso de uma adolescente de 12 anos de idade com eritema ab igne produzido por computador laptop. É discutido como os computadores geram calor e a importância da notificação pelos fabricantes da possibilidade de aparecimento desta dermatose nos usuários de computadores portáteis.