INTERNATIONAL JOURNAL OF BIOLOGICAL MARKERS, cilt.29, sa.2, 2014 (SCI-Expanded)
Introduction: Carcinoembryonic antigen (CEA) is a commonly used tumor marker, and its value in colon cancer is well established. However it is overexpressed in many different tumors. Here we report a case of colorectal cancer with high postoperative CEA levels that were associated with medullary thyroid carcinoma.