FGFR4 and squamous cell carcinoma: FGFR1 was more highly expressed in adeno-/adenosquamous carcinoma, while FGFR2, FGFR3, and FGFR4 expression was more prominent in squamous cell carcinoma (P = 0.020, P < 0.001, P < 0.001, and P = 0.020, respectively) (Table 2).