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Minerva Urologica e Nefrologica 2019 October;71(5):516-23

DOI: 10.23736/S0393-2249.19.03401-5

Copyright © 2019 EDIZIONI MINERVA MEDICA

lingua: Inglese

Body Mass Index and prostatic-specific antigen are predictors of prostate cancer metastases in patients undergoing robot-assisted radical prostatectomy and extended pelvic lymph node dissection

Antonio B. PORCARO 1 , Alessandro TAFURI 1, 2, Marco SEBBEN 1, Tania PROCESSALI 1, Marco PIROZZI 1, Nelia AMIGONI 1, Riccardo RIZZETTO 1, Aliasger SHAKIR 2, Giovanni E. CACCIAMANI 2, Matteo BRUNELLI 3, Salvatore SIRACUSANO 1, Maria Angela CERRUTO 1, Walter ARTIBANI 1

1 Department of Urology, Azienda Ospedaliera Universitaria Integrata Verona, University of Verona, Verona, Italy; 2
Catherine & Joseph Aresty Department of Urology, USC Institute of Urology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA; 3 Department of Pathology, Azienda Ospedaliera Universitaria Integrata Verona, University of Verona, Verona, Italy



BACKGROUND: The aim of this study was to investigate the risk factors contributing to multiple lymph node invasion (LNI) in patients with prostate cancer (PCa) undergoing extended pelvic lymph node dissection (ePLND) during robot assisted radical prostatectomy (RARP).
METHODS: A total of 211 patients who underwent RARP and ePNLD from June 2013 to March 2017 were classified according to lymph node status in the surgical specimen (absent, single or multiple). Risk factors of LNI were evaluated by the multinomial logistic regression model. A receiver operating characteristic (ROC) curve and area under the curve (AUC) were used to assess the efficacy of factors and model evaluation.
RESULTS: On multivariate analysis, the risk of multiple LNI, was independently increased by Body Mass Index (BMI) (odds ratio [OR] 1.194; P=0.026) and prostate-specific antigen (PSA) (OR=1.089; P=0.014) when compared to patients without LNI. ROC curves indicated that both BMI (AUC=0.702) and PSA (AUC=0.732) had fair discrimination power. For each unit of increase in PSA, the odds of multiple lymph node invasion increased by 8.9% and for each unit increase of BMI, the odds of multiple LNI increased by 19.4%.
CONCLUSIONS: The risk of multiple LNI was independently predicted by PSA and BMI with fair discrimination power.


KEY WORDS: Prostatic neoplasms; Body Mass Index; Lymph node excision; Robot surgical procedures; Prostatectomy; Neoplasm metastasis

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