Management of skin sarcoidosis with minocycline monotherapy.

A 46-year-old woman with severe skin sarcoidosis, mainly on the back of the trunk, persisting for >15 years, was followed up without systemic treatment. In 2014, she was started on minocycline monotherapy owing to worsening of the skin sarcoid lesions. Surprisingly, after approximately 1 year of the monotherapy, nearly all skin lesions resolved with only light residual scars, despite the poor efficacy of the monotherapy for pulmonary sarcoidosis. The patient's serum angiotensin-converting enzyme levels also decreased to the normal range. The presence of Propionibacterium acnes was confirmed when a retrospectively immunostained epithelioid granuloma, obtained from skin biopsy, demonstrated staining with monoclonal antibodies specific for P. acnes. Minocycline monotherapy, thus, appears to be a possible treatment modality for skin sarcoidosis.