A Case of Behcet’s Disease Complicated by IgA Nephropathy

Behcet’s disease (BD) is a rare, multisystemic disorder characterized by vasculitis. Although renal involvement rarely coexists with BD, several types of renal involvements have been reported: amyloidosis, glomerulonephritis and vascular involvement. Herein, we report a rare case of BD complicated with IgA nephropathy (IgAN). A 42-year-old woman visited the hospital due to joint pains and painful subcutaneous nodules. Based on her medical history of recurrent orogenital ulcers, arthritis, enteral ulcers, erythema nodosum-like skin lesions, and a positive pathergy test, we diagnosed her with BD. To evaluate proteinuria, we performed a renal biopsy. The patient was diagnosed with BD complicated with IgAN, and treated with a low dosage of steroid, colchicine, as well as angiotensin II type I receptor blockers. Although renal involvement in BD is rare, it is important to periodically perform renal function assessments in patients with BD involving abnormal urine results.