[Photo-induced sarcoidosis].

INTRODUCTION: Among the multiple forms of clinically atypical cutaneous sarcoidosis, lesions limited to light-exposed areas are rare. We describe a fourth observation. CASE REPORT: A phototype V 51-year-old woman, born in Tunisia presented with papular erythema on the face. Treatment with topical steroids did not result in any improvement. Biopsy specimen revealed a non caseating granuloma according with sarcoidosis. Assessment for systemic sarcoidosis was negative. Phototesting showed no abnormalities. The patient was successfully treated with chloroquine. DISCUSSION: Only three similar observations are reported in the literature. The role of light exposure despite the negative phototesting seems to be real. The tallying of these four observations permits one to isolate photo-induced sarcoidosis as a single entity.