Abstract
Background
This study aimed to examine the prognostic role of Prognostic Nutritional Index (PNI) dynamics in the pre- and postoperative periods for patients with renal cell carcinoma (RCC) who undergo radical nephrectomy (RN).
Methods
The study analyzed 324 patients with RCC who underwent RN. The overall population was classified into four groups according to four types of pre- to postoperative PNI dynamics as follows: group 1 (low → low PNI), group 2 (low → high PNI), group 3 (high → low PNI), and group 4 (high → high PNI). The level of PNI was calculated using the following formula: 10 × serum albumin level (g/dL) + 0.005 × absolute lymphocyte counts in blood (/mm3). The primary end point was cancer-specific survival (CSS), and the secondary end point was overall survival (OS).
Results
The patients with higher pre- and postoperative PNI (>45) had better survival outcomes than those with lower pre- and postoperative PNI (≤45). Notably, the patients in group 4 showed the best CSS and OS rates, whereas the patients in group 1 had the worst survival outcomes. Furthermore, PNI dynamics were identified as an independent predictor of CSS and OS outcomes, in addition to pre- and postoperative PNI, tumor size, and pathologic T (pT) stage. The patients with localized RCC (≤pT2) showed significant differences in both CSS and OS estimates, whereas the patients with advanced pT stage (≥pT3) demonstrated a difference only in OS outcomes, according to PNI dynamics.
Conclusions
This study is the first to provide the independent prognostic importance of dynamics of nutritional status for patients with RCC.
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Acknowledgments
This research was also supported by a Grant of the Korea Health Technology R&D Project through the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health and Welfare, Republic of Korea (Grant No. HI17C0025). This funding organization had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.
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Supplementary material 1 (JPEG 88 kb) Fig. S1. Cancer-specific survival according to a preoperative PNI and b 6 months postoperative PNI in patients with localized renal cell carcinoma (pT1 and 2) who underwent radical nephrectomy. c Cancer-specific survival according to the dynamics of PNI following radical nephrectomy (1 low → low, 2 low → high, 3 high → low, 4 high → high) in patients with localized renal cell carcinoma (pT1 and 2) who underwent radical nephrectomy
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Supplementary material 2 (JPEG 89 kb) Fig. S2. Overall survival according to a preoperative PNI and b 6 months postoperative PNI in patients with localized renal cell carcinoma (pT1 and 2) who underwent radical nephrectomy. c Overall survival according to the dynamics of PNI following radical nephrectomy (1 low → low, 2 low → high, 3 high → low, 4 high → high) in patients with localized renal cell carcinoma (pT1 and 2) who underwent radical nephrectomy
10434_2017_6065_MOESM3_ESM.jpeg
Supplementary material 3 (JPEG 55 kb) Fig. S3. Cancer-specific survival according to a preoperative PNI and b 6 months postoperative PNI in patients with localized renal cell carcinoma (pT3 and 4) who underwent radical nephrectomy
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Supplementary material 4 (JPEG 56 kb) Fig. S4. Overall survival according to a preoperative PNI and b 6 months postoperative PNI in patients with localized renal cell carcinoma (pT3 and 4) who underwent radical nephrectomy
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Supplementary material 5 (JPEG 79 kb) Fig. S5. a Cancer-specific survival and b overall survival according to the dynamics of PNI following radical nephrectomy (1 low → low, 2 low → high, 3 high → low, 4 high → high) in patients with localized renal cell carcinoma (pT3 and 4) who underwent radical nephrectomy
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Kang, M., Chang, C.T., Sung, H.H. et al. Prognostic Significance of Pre- to Postoperative Dynamics of the Prognostic Nutritional Index for Patients with Renal Cell Carcinoma Who Underwent Radical Nephrectomy. Ann Surg Oncol 24, 4067–4075 (2017). https://doi.org/10.1245/s10434-017-6065-2
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DOI: https://doi.org/10.1245/s10434-017-6065-2