We found lymphoid neoplasm diffuse large B-cell lymphoma (DLBC) ranked first in the expression of PD-1 among the 33 cancer types, while uveal melanoma (UVM), adrenocortical carcinoma (ACC), and brain lower grade glioma (LGG) expressed lower PD-1 than most of the cancer types. This evidence concerns the gene PDCD1 and lymphoid neoplasm.