TRIANGLE operation, combined with adequate adjuvant chemotherapy, can improve the prognosis of pancreatic head cancer: A retrospective study

Figure 6 Kaplan-Meier curves of the four groups. A: Kaplan-Meier curve of recurrence-free survival (RFS) between the four groups. The median RFS (mRFS) for groups 1, 2, 3, and 4 were 9.8, 16.4, 24.6, and 30.0 months, respectively. From group 1 to group 4, the mRFS progressively increased. The mRFS of group 1 was significantly shorter than that of groups 2, 3, and 4; group 4 exhibited a significantly longer mRFS than group 2 did; B: Kaplan-Meier curve of overall survival (OS) between the four groups. The median OS (mOS) for groups 1, 2, 3, and 4 were 23.0, 32.2, 24.0 months, and not reached, respectively. The mOS of groups 2 and 4 was significantly longer than that of groups 1 and 3, and the mOS of group 4 was significantly longer than that of group 2. Group 1: No clearance of the Heidelberg triangle and not receiving ≥ 6 months of adjuvant chemotherapy; Group 2: No clearance of the Heidelberg triangle but receiving ≥ 6 months of adjuvant chemotherapy; Group 3: Clearance of the Heidelberg triangle but not receiving ≥ 6 months of adjuvant chemotherapy; Group 4: Clearance of the Heidelberg triangle and receiving ≥ 6 months of adjuvant chemotherapy. RFS: Recurrence-free survival; OS: Overall survival.