“…There were fifteen studies assessing CD45RO and survival in rectal, colon or colorectal cancer, one of which had an overlapping cohort [61], leaving 14 independent studies comprising 4235 patients [54,60,69,84,93,98,109,111,[117][118][119]122,127,131]. Twelve studies found CD45RO to be associated with better survival, but only eleven (3992 patients) of these were independent [54,60,69,98,109,[117][118][119]122,127,131]. In rectal cancer, there were two studies (263 patients) assessing CD45RO, both finding it to be significantly associated with survival: one of which performed a manual assessment of CD45RO in pre-treatment biopsies [69], the other an electronic assessment in post-resection specimens [131].…”