PPP1R18 and cancer: Among the 19 cancer types, PPP1R18/KIAA1949 (p = 2.98 × 10−32, Figure 9J) and TOM1L1 (p = 3.87 × 10−30, Figure 9L) exhibited the highest specificity for KIRC/ccRCC, and CFB also presented excellent specificity for KIRC/ccRCC (p = 3.76 × 10−13, Figure 9K).