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[Particular aspects of ulcers in children].

Leg ulcers of juvenile onset are uncommon. The infectious origin is fairly frequent but the presence of leg ulcers in children should prompt an investigation into possible underlying causes especially hemangioma, vasculitis, inborn errors of metabolism (i.e. prolidase deficiency), hemoglobinopathies, occult spinal dysraphism and immunodeficiencies. Bacteriological investigations are essential and a skin biopsy specimen may be able to differentiate some of these disorders.