Leucine zipper-EF-hand containing transmembrane protein 1 (LETM1) as one of the cancer-related lncRNAs is shown to be upregulated in various human tumors including breast, bladder, and RCC (Huang et al., 2017[19]; Xu et al., 2018[63]). The gene discussed is LETM1; the disease is renal cell carcinoma.