Our previous evidence support that glycosylated CTSV (band 43 kDa) is particularly expressed in lung cancer samples, and the first glycosylation band (band 43 kDa) of CTSV, which has been secreted outside of the cells, we reasoned that the glycosylated CTSV might serve as a more sensitive prognosis marker for lung cancer. Here, CTSV is linked to lung carcinoma.