Causes
An autoimmune disease whose cause is not fully understood. There is a breed predisposition. Sunlight worsens the lesions.
Diagnosis
Skin biopsy plus blood work. The systemic form requires additional tests to assess the internal organs.
Treatment
Immunomodulators and sun protection for the cutaneous form. The systemic form needs immunosuppressants and monitoring of the affected organs. It is a chronic disease.
Prevention
Not preventable. Protecting from the sun reduces flare-ups in the cutaneous form.

