Gyrate erythema in a patient with dental radicular cyst.

Nonspecific gyrate erythemas (NGE) are commonly associated with hypersensitivity reactions to exogenous or endogenous antigens. A case of NGE with clinical resemblance to tinea corporis in a patient with a dental radicular cyst is reported. Cutaneous lesions disappeared after surgical excision of the dental cyst. The clinical and pathological details are described and the relationship between radicular cyst and cutaneous lesions discussed. Earlier reports are reviewed and the possibility of a focal origin is emphasized.