PTK2 and cancer: Increased FAK expression or activity has been observed by various methods (Western blot, IHC, Northern blot, quantitative real-time polymeric chain reaction, immunohistochemistry (IHC)) in many human cancers, including lung, head and neck, oral cavity, thyroid, breast, ovarian, prostate, colon, liver, stomach, pancreas, kidney, skin, and bone cancers [63,64,65,66].