Megalin and cubilin expression showed no significant difference between pSS + TIN patients and the GML group (0.14 ± 0.01 vs 0.16 ± 0.01, p = 0.320; 0.10 ± 0.01 vs 0.11 ± 0.01, p = 0.628), while there was a trend toward reduced expression in SS + Fanconi syndrome patients compared with the pSS + TIN group (0.10 ± 0.02 vs 0.14 ± 0.01, p = 0.095; 0.05 ± 0.01 vs 0.10 ± 0.01, p = 0.008). This evidence concerns the gene CUBN and Fanconi renotubular syndrome.