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Table 2 Relationship between the size of the tumor and pre-operative carcinoembryonic antigen levels

From: Carcinoembryonic antigen levels correlated with advanced disease in medullary thyroid cancer

Size of tumor (mm) Pre-OP CEA (ng/ml)
1–9 3.36
10–19 6.42
20–29 16.54
30–39 168.63
40+ 188.73