Remitting seronegative symmetrical synovitis with pitting edema syndrome in individuals with type 2 diabetes mellitus or impaired glucose tolerance

An association between remitting seronegative symmetrical synovitis with pitting edema (RS3PE) syndrome and insulin or dipeptidyl peptidase-4 (DPP4) inhibitor therapy were previously reported. We encountered four cases of RS3PE syndrome with type 2 diabetes mellitus or impaired glucose tolerance (IGT) without insulin or DPP4 inhibitor medication.