Construction and Validation of a Nomogram for Predicting Progression- Free Survival in Patients with Early-Stage Testicular Germ Cell Tumor

Author(s): Jin-Guo Chen, Jing-Quan Wang, Tian-Wen Peng, Zhe-Sheng Chen*, Shan-Chao Zhao*

Journal Name: Recent Patents on Anti-Cancer Drug Discovery

Volume 16 , Issue 1 , 2021


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Abstract:

Background: Testicular Germ Cell Tumor (TGCT) is the most common malignant tumor in young men, but there is a lack of a prediction model to evaluate the prognosis of patients with TGCT.

Objective: To explore the prognostic factors for Progression-Free Survival (PFS) and construct a nomogram model for patients with early-stage TGCT after radical orchiectomy.

Methods: Patients with TGCT from The Cancer Genome Atlas (TCGA) database were used as the training cohort; univariate and multivariate cox analysis was performed. A nomogram was constructed based on the independent prognostic factors. Patients from the Nanfang Hospital affiliated with Southern Medical University were used as the cohort to validate the predictive ability using the nomogram model. Harrell's concordance index (C-index) and calibration plots were used to evaluate the nomogram.

Results: A total of 110 and 62 patients with TGCT were included in the training cohort and validation cohort, respectively. Lymphatic Vascular Invasion (LVI), American Joint Committee on Cancer (AJCC) stage and adjuvant therapy were independent prognostic factors in multivariate regression analyses and were included to establish a nomogram. The C-index in the training cohort for 1- , 3-, and 5-year PFS were 0.768, 0.74, and 0.689, respectively. While the C-index for 1-, 3-, and 5- year PFS in the external validation cohort were 0.853, 0.663 and 0.609, respectively. The calibration plots for 1-, 3-, and 5-year PFS in the training and validation cohort showed satisfactory consistency between predicted and actual outcomes. The nomogram revealed a better predictive ability for PFS than AJCC staging system.

Conclusion: The nomogram as a simple and visual tool to predict individual PFS in patients with TGCT could guide clinicians and clinical pharmacists in therapeutic strategy.

Keywords: Testicular cancer, testicular germ cell tumor, platinum-based chemotherapy, nomogram, progression-free survival, recurrence, prognosis.

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Article Details

VOLUME: 16
ISSUE: 1
Year: 2021
Published on: 10 February, 2021
Page: [44 - 53]
Pages: 10
DOI: 10.2174/1574892816666210211092108
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