Evaluation of the correlation between tumor HHLA2 and clinicopathologic parameters in KIRC patients from two TAMs (n = 90 and n = 150) and 250 clinical samples revealed that tumor grade was correlated with HHLA2 expression in the validation 1 (n = 150) and 2 (n = 250) groups (Table 3). The gene discussed is HHLA2; the disease is neoplasm.