TGFB1 and neoplasm: The mean percentages of LAP+ B cells increased on day 9 (20.5%) and day 20 (30.7%) compared to the mean percentage on day 0 (9.4%), whereas the mean percentages of monocytes, which were mostly positive for LAP before tumor inoculation, decreased on day 9 (51.0%) and day 20 (64.0%) compared to the mean percentage on day 0 (99.4%).