In the studied patients with MM, urinary markers of tubular injury were interrelated (we report Pearson correlation coefficients after log-transformation of the variables): urinary cystatin C correlated positively with NGAL monomer (R = 0.24; p = 0.008), IGFBP-7 (R = 0.29; p = 0.001), and TIMP-2 (R = 0.27; p = 0.002); NGAL correlated positively with IGFBP-7 (R = 0.41; p < 0.001) and TIMP-2 (R = 0.20; p = 0.024); and IGFBP-7 correlated positively with TIMP-2 (R = 0.29; p = 0.001). Here, CST3 is linked to Miyoshi myopathy.