Elevated keratin 21-1 is one of the tumor markers for non-small cell lung cancer, and if the result is high, it may mean that you have lung cancer.
Elevated keratin 21-1, if it is above normal, requires an MRI to see if lung cancer is present based on the results of the test. The first thing you need to do is to get a good idea of what you’re doing.
Keratin 21-1, which is usually used clinically as a secondary diagnosis for lung cancer, has a 64% chance of being positive if the test result is high, which can be very helpful in detecting the progress of lung cancer patients.
But the clinical diagnosis of lung cancer is not only confirmed by keratin 21-1, but also by the combination of clinical symptoms and various tests.