IMP3 and head and neck squamous cell carcinoma: Furthermore, lymphocyte antigen 6 family member K (LY6K)- (also known as URLC10), CDCA1-, and U3 small nucleolar ribonucleoprotein protein IMP3 (IMP3)- (also known as KOC1) specific CTL responses of 85.7%, 64.3%, and 42.9% have been identified previously in patients with advanced head and neck squamous cell carcinoma [30].