BSG and infection: As for cases not included in the three groups, the plasma and urinary Basigin/CD147 levels were 3608 pg/mL and 617.1 μg/gCre, respectively, in the patient with BK nephropathy, 4888 pg/mL and 304.1 μg/gCre, respectively, in the patient with recurrent IgA nephropathy, 4700 pg/mL and 922.0 μg/gCre, respectively, in the patient with necrotic glomerulonephritis, and 1746 pg/mL and 551.7 μg/gCre, respectively, in the patient with infection-related glomerulonephritis.