Interstitial granulomatous dermatitis with arthritis.

A 54-year-old woman with a history of arthritis presented for a long-standing history of symmetric, indurated plaques on her thighs and lateral aspects of the trunk. Histopathologic examination of skin biopsy specimens was consistent with interstitial granulomatous dermatitis, and a diagnosis of interstitial granulomatous dermatitis with arthritis was made. Administration of topical potent glucocorticoids, intralesional glucocorticoids, and narrow-band ultraviolet B phototherapy, in addition to continuation of systemic glucocorticoids and methotrexate, resulted in improvement of her cutaneous and musculoskeletal disease.