HK2 expression was associated with the infiltration of T follicular helper cells for the TCGA tumors of uveal melanoma, breast invasive carcinoma (BRCA), breast invasive carcinoma-luminalA (BRCA-LumA), head and neck squamous cell carcinoma (HNSC), head and neck squamous cell carcinoma with HPV positive (HNSC-HPV+), and cancer-associated fibroblasts for the tumors of brain lower grade glioma and stomach adenocarcinoma. The gene discussed is HK2; the disease is gastric adenocarcinoma.