In head pancreatic adenocarcinoma, corresponding metastatic rates of subgroups of lymph nodes was 6 (33.3%), 8a (0%), 8p (0%), 9 (0%), 12a (0%), 12b (0%), 12p (16.7%), 13a (0%), 13b (16.7%), 14p (33.3%), 14d (16.7%), 16a2 (16.7%), 16b1 (0%), 17a (33.3%), 17b (50%).