CORRELATION OF NEUTROPHIL-LYMPHOCYTE RATIO (NLR) AND PLATELET-LYMPHOCYTE RATIO (PLR) WITH COMPLICATIONS AND POSTOPERATIVE SURVIVAL IN SURGERY FOR BONE METASTASIS OF THE APPENDICULAR SKELETON

Abstract

Introduction: Bone metastasis is the most common malignant neoplasm of the skeleton, and surgical decision-making depends on multiple factors, including postoperative complications and life expectancy. The identification of new prognostic factors can assist in decision making.

Objective: In long bones metastases, to analyze the incidence of complications and postoperative survival up to 1 year, correlating them with NLR and PLR.

Method: Review of 160 medical records of patients who underwent surgery for bone metastasis in the appendicular skeleton. In addition to epidemiological characteristics, NLR and PLR values were determined, correlating them with survival and complications.

Result: Women represented 64.5% with a primary breast tumor in 62.6%; the proximal femur was the most affected; median survival was 13.2 months and in 1 year 34.7%. Tumor resection with endoprosthesis was more common. The post-surgical complication rate was 10% and the average time for post-operative complications to occur was 27.9 days (0-140). An association between the neutrophil variable and postoperative complications was found (p=0.04). For every 100 more units of neutrophils there was a 1% increase in the chances of post-surgical complications. Mean NLR and PLR values were, respectively, 5.3 (0.2-30.7) and 199.7 (32.1-676.7). Patients with NLR NLR ≥ 2 (p<0,001) showed a decrease in survival from 92,3% to 62,5% at the 3^rd month, and from 61,5% to 31,3% at 1 year. Those with PLR ≥209 (p<0.001) showed a decrease in survival from 69% to 59.3% at the 3rd month, and from 40.2% to 25.9% at 1 year.

Conclusion: There was no positive association between NLR and PLR with postoperative complications, but strongly yes with survival from the 3rd month after surgery.