Within the ALK-positive G1, G2, and G3 cases, cytoplasmic and membranous ALK immunoreactivities were observed in 7 (50%) and 7 (50%), 0 (0%) and 3 (100%), and 13 (76.5%) and 4 (23.5%) cases, respectively; the difference between G3 scores and the other tumor grades was statistically significant (Supplementary Table S1). Here, ALK is linked to neoplasm.