Posttreatment surveillance of thyroid cancer is done with US of the thyroid bed as well as monitoring of tumor markers such as serum thyroglobulin and serum calcitonin.
Thus assuming all MTC cases had calcitonin measured, MTC is 7 of 341 (2.05%) of the total thyroid cancer burden at the hospital and 7 of 2070 (0.338%) of all thyroid nodules.