Further analysis revealed that patients with amyloidosis were older and had higher levels of eGFR, higher serum C3 values, more urinary protein, more abnormal free light-chain ratios, more abnormal bone marrow outcomes, lower serum albumin and creatinine, and fewer cases of hematuria than those with non-amyloidosis MGRS [8, 9, 12, 15]. Here, C3 is linked to amyloidosis.