In ampullary adenocarcinoma, corresponding metastatic rates of subgroups of lymph nodes was 6 (0%), 8a (5.9%), 8p (5.9%), 9 (0%), 12a (0%), 12b (5.9%), 12p (0%), 13a (11.8%), 13b (5.9%), 14p (5.9%), 14d (11.8%), 16a2 (0%), 16b1 (0%), 17a (0%).