LY6E and head and neck cancer: Ly6E mRNA expression was significantly increased in head and neck cancer (n=396) than normal tissues (n=17) Toruner [89], Giordano [90], Ye [91], Peng [92], Peng 2 [92], He [23], Cromer [93], Estilo [22], Vasko [94], Ginos [95] and Frierson [24] studies.