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Yoneda K, Utsumi T, Somoto T, Wakai K, Oka R, Endo T, Yano M, Kamiya N, Hiruta N, Suzuki H. External validation of two web-based postoperative nomograms predicting the probability of early biochemical recurrence after radical prostatectomy: a retrospective cohort study. Jpn J Clin Oncol 2018; 48:195-199. [PMID: 29228232 DOI: 10.1093/jjco/hyx174] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Accepted: 11/14/2017] [Indexed: 12/29/2022] Open
Abstract
The present study aimed to validate and compare the predictive accuracies of the Memorial Sloan Kettering Cancer Center (MSKCC) and Johns Hopkins University (JHU) web-based postoperative nomograms for predicting early biochemical recurrence (BCR) after radical prostatectomy (RP) and to analyze clinicopathological factors to predict early BCR after RP using our dataset. The c-index was 0.72 (95% confidence (CI): 0.61-0.83) for the MSKCC nomogram and 0.71 (95% CI: 0.61-0.81) for the and JHU nomogram, demonstrating fair performance in the Japanese population. Furthermore, we statistically analyzed our 174 patients to elucidate prognostic factors for early BCR within 2 years. Lymphovascular invasion (LVI) including lymphatic vessel invasion (ly) was a significant predictor of early BCR in addition to common variables (pT stage, extraprostatic extension, positive surgical margin and seminal vesicle invasion). LVI, particularly ly, may provide a good predictor of early BCR after RP and improve the accuracy of the nomograms.
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Affiliation(s)
- Kei Yoneda
- Department of Urology, Toho University Sakura Medical Center, Chiba,Japan
| | - Takanobu Utsumi
- Department of Urology, Toho University Sakura Medical Center, Chiba, Japan.,Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, USA
| | - Takatoshi Somoto
- Department of Urology, Toho University Sakura Medical Center, Chiba,Japan
| | - Ken Wakai
- Department of Urology, Toho University Sakura Medical Center, Chiba,Japan
| | - Ryo Oka
- Department of Urology, Toho University Sakura Medical Center, Chiba,Japan
| | - Takumi Endo
- Department of Urology, Toho University Sakura Medical Center, Chiba,Japan
| | - Masashi Yano
- Department of Urology, Toho University Sakura Medical Center, Chiba,Japan
| | - Naoto Kamiya
- Department of Urology, Toho University Sakura Medical Center, Chiba,Japan
| | - Nobuyuki Hiruta
- Department of Surgical Pathology, Toho University Sakura Medical Center, Chiba,Japan
| | - Hiroyoshi Suzuki
- Department of Urology, Toho University Sakura Medical Center, Chiba,Japan
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