[Atypical erythema gyratum repens secondary to bronchogenic carcinoma].

Erythema gyratum repens (EGR) is an obligate paraneoplastic eruption that indicates an underlying malignancy, most commonly cancer of the lung or breast. The characteristic clinical finding is a rapidly expanding, mildly scaling dermatosis with a 'wood-grain' pattern. This typical concentric erythema is not seen in all patients. Other findings may include pruritus, palmoplantar keratoderma and/or blood eosinophilia. We report a case of EGR where the diagnosis was suggested less by the wood-grain pattern than by the dynamics of the lesions.