of the study. CDT more than 2 years: 41 patients out of 41 (100%) were alive at the end of the study. These included 1 patient whose calcitonin was stable, and 11 patients who had decreasing calcitonin levels. The calcitonin doubling time was a better predictor of MTC survival than CEA but following both tests is recommended. References External links Thyroid cancer Amyloidosis