Diagnostic value of selected biochemical markers in the detection of recurrence of medullary thyroid cancer — comparison of calcitonin, procalcitonin, chromogranin A, and carcinoembryonic antigen

Abstract

Our study confirms that PCT can be considered as an equivalent alternative for measurement of calcitonin. On the other hand, it is also worth noting that MTC can be a rare cause of very high levels of PTC not resulting from infectious diseases. The diagnostic value of CEA and chromogranin A is much lower and can be within the normal range even in patients with advanced, metastatic MTC. They should be used only as accessory markers.