Generalized perforating granuloma annulare: case report.

We report a case of a 26-year-old Caucasian male presented with 8-month history of asymptomatic erythematous papulonodular lesions symmetrically located on the face, trunk and limbs. Histopathologic examination revealed granulomas with histiocytes arranged in a palisading pattern around the foci of necrobiotic collagen with mucin deposition, and transepidermal and transfollicular elimination of degenerated collagen bundles. These histopathologic findings were compatible with perforating granuloma annulare.