“…Therefore, lupus peritonitis, nephrotic syndrome, constrictive pericarditis and Budd–Chiari syndrome were ruled out. We postulated that hypoproteinemia was due to protein-losing enteropathy, resulting in intestinal damage caused by SLE (diarrhea, bowel wall edema and mesenteric vasculitis), consistent with previous studies[ 6 , 7 ]. However, 99m-labeled human serum albumin is required for definite diagnosis[ 8 ], which is not available at our hospital.…”