RETRACTION: T. Fan, W. Zhu, M. Kong, et al., “The Significance of PAX8-PPARγ Expression in Thyroid Cancer and the Application of a PAX8-PPARγ-Targeted Ultrasound Contrast Agent in the Early Diagnosis of Thyroid Cancer,” Contrast Media & Molecular Imaging 2022 (2022): 3265342, https://doi.org/10.1155/2022/3265342. This evidence concerns the gene PPARG and thyroid cancer.