RT Journal Article T1 Site-Specific Variation in Radiomic Features of Head and Neck Squamous Cell Carcinoma and Its Impact on Machine Learning Models. A1 Liu, Xiaoyang A1 Maleki, Farhad A1 Muthukrishnan, Nikesh A1 Ovens, Katie A1 Huang, Shao Hui A1 Pérez-Lara, Almudena A1 Romero-Sanchez, Griselda A1 Bhatnagar, Sahir Rai A1 Chatterjee, Avishek A1 Pusztaszeri, Marc Philippe A1 Spatz, Alan A1 Batist, Gerald A1 Payabvash, Seyedmehdi A1 Haider, Stefan P A1 Mahajan, Amit A1 Reinhold, Caroline A1 Forghani, Behzad A1 O'Sullivan, Brian A1 Yu, Eugene A1 Forghani, Reza K1 classification K1 head and neck squamous cell carcinomas K1 human papilloma virus K1 machine learning K1 metastasis K1 radiomics AB Current radiomic studies of head and neck squamous cell carcinomas (HNSCC) are typically based on datasets combining tumors from different locations, assuming that the radiomic features are similar based on histopathologic characteristics. However, molecular pathogenesis and treatment in HNSCC substantially vary across different tumor sites. It is not known if a statistical difference exists between radiomic features from different tumor sites and how they affect machine learning model performance in endpoint prediction. To answer these questions, we extracted radiomic features from contrast-enhanced neck computed tomography scans (CTs) of 605 patients with HNSCC originating from the oral cavity, oropharynx, and hypopharynx/larynx. The difference in radiomic features of tumors from these sites was assessed using statistical analyses and Random Forest classifiers on the radiomic features with 10-fold cross-validation to predict tumor sites, nodal metastasis, and HPV status. We found statistically significant differences (p-value ≤ 0.05) between the radiomic features of HNSCC depending on tumor location. We also observed that differences in quantitative features among HNSCC from different locations impact the performance of machine learning models. This suggests that radiomic features may reveal biologic heterogeneity complementary to current gold standard histopathologic evaluation. We recommend considering tumor site in radiomic studies of HNSCC. SN 2072-6694 YR 2021 FD 2021-07-24 LK http://hdl.handle.net/10668/18314 UL http://hdl.handle.net/10668/18314 LA en DS RISalud RD Apr 17, 2025