Superimposed Polymyositis in a Patient with Myeloperoxidase-Related Crescentic Glomerulonephritis

Abstract

Renal involvement especially glomerulonephropathy in polymyositis or dermatomyositis is considered rare. Crescentic glomerulonephritis is even more so. Herein, we report a patient who was diagnosed with concurrent polymyositis and myeloperoxidase-related crescentic glomerulonephritis. We discuss the association between polymyositis or dermatomyositis and renal involvement, glomerulonephropathy, and crescentic glomerulonephritis. This is the first report of a case of polymyositis and myeloperoxidase-related crescentic glomerulonephritis with a clear temporal correlation.