KRAS and thyroid gland carcinoma: The aim of this study was to evaluate the diagnostic value of four commonly utilized ultrasound RSSs (the American College of Radiology [ACR], European [EU], Korean [K] TI-RADSs and American Thyroid Association [ATA] US-based RSS criteria) [1, 24–26] in combination with activating point mutations of the RAS gene (NRAS, HRAS, and KRAS) for detecting thyroid carcinoma in cytologically indeterminate and suspicious for malignancy thyroid nodules at the authors’ institution.