Serum CA19-9

Pancreatic tumor marker (CA 19-9) is a pancreatic cancer-related antigen whose expression depends on the expression of the lewis blood group antigen. Lewis-negative CA19-9 tests are also negative. CA19-9 is sensitive and specific for the diagnosis of pancreatic cancer. It is 83.1% 73% 75% and the level of CA19-9 in patients with small pancreatic cancer is not high and less than 2cm. The positive rate of adenocarcinoma is only 60.7%, while the level of CA19-9 in patients with larger tumors is higher. Those who set 120kU / L higher than this value are highly suspected of pancreatic cancer. At the same time, they can also judge the prognosis. CA19-9 will return to normal after tumor resection. Serum critical value is 30kU / L. The prognosis is better. 9 increased significantly again so CA19-9 is an effective marker for pancreatic cancer.