Intravenous immunoglobulin G use in patients with chronic inflammatory demyelinating polyneuropathy: An uncommon cause of drug-induced discoid lupus erythematosus.

Drug-induced chronic cutaneous lupus erythematosus, or drug-induced discoid lupus erythematosus, is a rare cutaneous phenomenon. Various medications have been associated with drug-induced discoid lupus erythematosus including fluorouracile agents, especially tegafur and uraciltegafur, and TNF-α antagonists such as infliximab or etanercept. Recent literature has described a case series of six patients receiving IgG immunoglobulin for chronic inflammatory demyelinating polyneuropathy with subsequent presentations of discoid lupus erythematosus. We present a patient with chronic inflammatory demyelinating polyneuropathy who developed discoid lupus erythematosus secondary to IgG immunoglobulin.