ThyroSpec is a thyroid nodule malignancy calculator. Simply enter the required data, and the app will calculate the associated malignancy risk. The app uses a regression model to predict thyroid nodule malignancy risk based on Bethesda Category, Palpation Discovery, US Category, Bethesda Atypia, Max nodule size, and ThyroSPEC Class. Please note that the regression model was developed using data from Calgary, Alberta, Canada and may not be accurate for other settings.