CD8A and neoplasm: The number of CD8+ T cells per mm2 tumor was found to be higher in the general anesthesia plus epidural anesthesia group (median: 292.8 [interquartile range (IQR) 198.0, 418.3]) than that in the general anesthesia group (median 204.7 [IQR 131.1, 305.8]; p = 0.036).