We present a case of a young female patient who for 8 years was believed to have discoid lupus erythematosus of the skin and oral mucosae. Only after her infant son had a near-fatal pulmonary infection was the diagnosis of chronic granulomatous disease made and her lupus erythematosus-like mucocutaneous lesions recognized as manifestations of her carrier status for chronic granulomatous disease. The purpose of this report is to raise awareness of and better characterize the mucocutaneous manifestations of carriers of chronic granulomatous disease. Early identification of carriers permits genetic counseling and prenatal diagnosis and forewarns pediatricians so that they can provide better care for affected infants.