The serum levels of CEA, CA199, CYFRA21-1, NSE and SCC in different Ccr were of significant statistical differences and were also have negative correlations with Ccr.

• 不同Ccr亚组间的CEA、CA199、CYFRA21-1、NSE和SCC的差异均有统计学意义(P值均<0.；05)；且与Ccr呈负相关(r值分别=-0