Approximately 1.4 million individuals in the United States have systemic lupus erythematosus, and about 85% of these individuals develop skin lesions at some point of their disease. Cutaneous lupus erythematosus represents the skin manifestations of systemic lupus erythematosus, and can appear in people with or without systemic lupus. It is a mentally, physically, and emotionally debilitating disease that affects both the quality of life and social well-being of those affected. The cause of cutaneous lupus is not completely understood, but likely includes multiple factors from our genes and the environment. Multiple genetic studies with small numbers of cutaneous lupus patients have been performed to determine which genes are associated with cutaneous lupus. This study aims to accumulate even larger numbers of patients to confidently identify genes and the proteins they encode that could contribute greatly to the formation of cutaneous lupus. The discovery of these genes and proteins would help not only uncover how cutaneous lupus forms, but also improve our abilities to diagnose this disease and predict its course, and stimulate new drug development.