Association of Pathological Features and Multiparametric MRI ‐Based Radiomics With TP53 ‐Mutated Prostate Cancer
Ruchuan Chen, Bingni Zhou, Wei Liu, Hualei Gan, Xiaohang Liu, Liangping Zhou - Radiology, Nuclear Medicine and imaging
Background
TP53 mutations are associated with prostate cancer (PCa) prognosis and therapy.
Purpose
To develop TP53 mutation classification models for PCa using MRI radiomics and clinicopathological features.
Study Type
Retrospective.
Population
388 patients with PCa from two centers (Center 1: 281 patients; Center 2: 107 patients). Cases from Center 1 were randomly divided into training and internal validation sets (7:3). Cases from Center 2 were used for external validation.
Field Strength/Sequence
3.0T/T2‐weighted imaging, dynamic contrast‐enhanced imaging, diffusion‐weighted imaging.
Assessment
Each patient's index tumor lesion was manually delineated on the above MRI images. Five clinicopathological and 428 radiomics features were obtained from each lesion. Radiomics features were selected by least absolute shrinkage and selection operator and binary logistic regression (LR) analysis, while clinicopathological features were selected using Mann–Whitney U test. Radiomics models were constructed using LR, support vector machine (SVM), and random forest (RF) classifiers. Clinicopathological‐radiomics combined models were constructed using the selected radiomics and clinicopathological features with the aforementioned classifiers.
Statistical Tests
Mann–Whitney U test. Receiver operating characteristic (ROC) curve analysis and area under the curve (AUC). P value <0.05 indicates statistically significant.
Results
In the internal validation set, the radiomics model had an AUC of 0.74 with the RF classifier, which was significantly higher than LR (AUC = 0.61), but similar to SVM (AUC = 0.69; P = 0.422). For the combined model, the AUC of RF model was 0.84, which was significantly higher than LR (0.64), but similar to SVM (0.80; P = 0.548). Both the combined RF and combined SVM models showed significantly higher AUCs than the radiomics models. In the external validation set, the combined RF and combined SVM models showed AUCs of 0.83 and 0.82.
Data Conclusion
Pathological‐radiomics combined models with RF, SVM show the association of TP53 mutations and pathological‐radiomics features of PCa.
Evidence Level
3
Technical Efficacy
Stage 2