Hydralazine-induced pulmonary-renal syndrome: a case report.

Drug-induced lupus erythematosus differs in its manifestation from drug-induced vasculitis. The former is associated with characteristic symptoms that improve following discontinuation, whereas the latter is predominantly an antineutrophil cytoplasmic antibody (ANCA) positive small vessel vasculitis involving the kidneys, skin, and lungs. We present a case of advanced disease in an elderly Caucasian woman requiring corticosteroids, and immunosuppressive therapy, who was on hydralazine for >2 years.