We found that among the nine cancer types under study, SLC9A1 was up-regulated in only three [breast invasive carcinoma (BRCA), HNSC, and thyroid carcinoma (THCA)] types, and down-regulated in six other types, as detailed in Table S1, indicating that SLC9A1 may not play a key role in most of the cancer types. The gene discussed is SLC9A1; the disease is cancer.