Author of

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  P1.05 - Poster Session with Presenters Present (ID 457)

  • Event: WCLC 2016
  • Type: Poster Presenters Present
  • Track: Early Stage NSCLC
  • Presentations: 1
  • Moderators:
  • Coordinates: 12/05/2016, 14:30 - 15:45, Hall B (Poster Area)

  • 16826

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    P1.05-075 - The Correlation between the Prognoses of Patients with Non-Small Cell Lung Cancer and Preoperative Platelet- Lymphocyte Ratio (ID 5137)

    14:30 - 15:45  |  Author(s): M. Shimomura
    • Abstract
    • Slides

    Background:
    The platelet- lymphocyte ratio (PLR) is a prognostic factor that correlates immunity or inflammation with tumor invasion. We retrospectively investigated the correlation between prognosis and preoperative PLR in patients with non-small cell lung cancer who underwent anatomical lung resection in our hospital.
    
    Methods:
    We conducted a retrospective study of 116 patients with primary lung cancer who underwent anatomical lung resection in our hospital from January 2009 to May 2014. We excluded patients who underwent previous lung resection or had intraoperative malignant pleural effusion or positive surgical margins. We analyzed 105 patients (65 with adenocarcinoma, 25 with squamous cell carcinoma, 9 with large cell carcinoma, and 2 with adenosquamous carcinoma). We constructed a ROC curve with PLR values calculated preoperative blood analyses and determined that the threshold was 160. We divided the patients into high and low PLR groups. We analyzed these two groups with respect to background, pathological findings, and cancer-specific survival. Additionally, we investigated factors that correlated with cancer-specific survival with.
    
    Results:
    The median patient age was 71 years (range, 50-88 years). There were 75 male patients and 25 female patients. The median follow-up duration was 43 months (range, 0-85 months). Regarding surgical techniques, 101 patients underwent lobectomy, 3 underwent segmentectomy, and 1 patient underwent sleeve lobectomy. A total of 47, 34, 8, 9, 6, and 1 patients were diagnosed with pathological stage IA, IB, IIA, IIB, IIIA, and IIIB cancer. The overall survival rate was 71.3%. When examining background characteristics, tumor size was larger and T factor was more elevated in the high PLR groups, and pathological stage was more advanced in the high PLR group. N factor was not significantly different between the two groups. Cancer-specific survival was significantly poorer in the high PLR group than in the low group (p=0.0007). Considering tumor types, patients with adenocarcinoma in the high PLR group had poorer prognosis compared to the patients with adenocarcinoma in the low PLR group (p=0.0002), but for squamous cell carcinoma and in the other tumor types, there was no significant difference (p=0.20 and p=0.86, respectively). Multivariate analysis revealed that PLR was an independent prognosis factor for the cancer-specific survival.
    
    Conclusion:
    In the patients who underwent anatomical resection with lung cancer, PLR was correlated with prognosis.
    
    

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