PDCD1 and cancer: Reports suggest that lncRNAs could be related with the expression of these markers in cancer (Kathuria et al., 2018; Wang et al., 2019; Wei et al., 2019; Peng et al., 2020; Salama et al., 2020; Samir et al., 2021) with Xiang et al. having shown that LINC00426 correlates with PDCD1 expression in ccRCC (Xiang et al., 2021).