these data suggest that in most clinically diagnosed patients , cancer cells do not have their own mhc class i products on their cell surfaces phenotypically , and this unique property may be related to the biological characteristic that permits cancer cells to survive and proliferate unrestrictedly in vivo , mainly escaping from the immune-surveillance system under cytotoxic t lymphocytes ( ctls ) , which need to recognize not only cancer-specific ( associated ) antigen ( s ) but also the self-mhc class i products to kill the cancer cells efficiently .
C0006826
cancer
C0334227
cancer cells