Background: Surgical resection is the mainstay of treatment for patients with gastric cancer (GC). Development of a simple, high-performance, integrated scoring system is needed to provide appropriate management. This study aimed to evaluate predictive values of the systemic inflammation score (SIS) for short- and long-term outcomes of patients who underwent surgery for GC.
Methods: A total of 187 patients who underwent gastrectomy for pT2-4 GC without preoperative treatment were analyzed. SIS was formulated based on serum albumin level and lymphocyte-monocyte ratio, and graded into SIS 0, 1, and 2.
Results: Preoperative SIS was significantly associated with incidence of postoperative complications, showing a stepwise increased incidence in proportion to SIS in the entire cohort and all subgroups according to operative procedure and disease stage. Overall and disease-free survival times of patients in SIS 0, 1, and 2 shortened in a stepwise fashion. SIS was linked to prevalence of hematogenous metastasis as initial recurrence site. Survival differences between patients with SIS 2 and the others were particularly large in patients who underwent adjuvant chemotherapy. The continuation rate of adjuvant S-1 was lower in the SIS 2 group.
Conclusion: SIS represents a simple predictor for incidence of postoperative complications and survival in patients with pT2-4 GC.