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[Juvenile plantar dermatosis: when are epicutaneous tests indicated?].

The aetiology of juvenile plantar dermatosis (JPD) is probably multifactorial. Atopy, frictional factors and the frequent alternation between a hot and wet microclimate and a dry one seem to favour the dermatosis. An allergic contact dermatitis does not only involve a difficult differential diagnosis; it can also cause secondary deterioration of existing JPD. For these reasons, an attempt is made in this paper to specify the situations in which patch tests are indicated.