TROAP and cancer: FAM64A and TROAP were selected based on the following five criteria: (1) they were rarely reported in previous researches; (2) they have been detected in tumor tissues; (3) their functions in cancer progression are still unclear; (4) they belong to cell cycle related genes and other genes, respectively; (5) their proportions of samples with log2(fold-change) ≥ 2 in all 633 samples ranked at the top in all the genes satisfying criteria (1-4).