RT Journal Article SR Electronic T1 Validation of the Effectiveness of Neutrophil-to-lymphocyte Ratio (NLR) as a Predictive Factor in Patients Undergoing Prostate Biopsy With Prostate Specific Antigen (PSA) Between 4.0 and 10.0 ng/ml JF In Vivo JO In Vivo FD International Institute of Anticancer Research SP 1641 OP 1646 DO 10.21873/invivo.12422 VO 35 IS 3 A1 HIROSHI MASUDA A1 KOSUKE MIKAMI A1 KOTARO OTSUKA A1 KYOKUSIN HOU A1 TAKAHITO SUYAMA A1 KAZUHIRO ARAKI A1 SATOKO KOJIMA A1 YUKIO NAYA YR 2021 UL http://iv.iiarjournals.org/content/35/3/1641.abstract AB Background/Aim: This study aimed to access the effectiveness of serum neutrophil-to-lymphocyte ratio (NLR) in patients undergoing prostate needle biopsy with a prostate specific antigen (PSA) between 4.0 and 10.0 ng/ml. Patients and Methods: A total of 633 cases were eligible. We evaluated several factors including age, PSA, PSA-density (PSAD), platelet-to-lymphocyte ratio (PLR) and NLR in the presence or absence of prostate cancer (PCa), retrospectively. We evaluated statistically the associations between each factor and pathological findings or Gleason score. Results: A total of 201 were evaluated in this study. Regarding the presence or absence of prostate cancer, there were statistically significant differences in age, PSA levels, PSAD, the PLR and NLR. The mean NLR value of the patients with PCa was significantly lower compared to the entire cohort. Multivariate analysis showed that age, PSAD, and NLR were independent risk factors predicting PCa. Conclusion: For patients having a PSA between 4.0 and 10.0 ng/ml, NLR was a predicting factor of PCa prior to prostate needle biopsy and an effective biomarker and useful tool for avoiding unnecessary biopsies.