Fig. 3

Pathologic and genetic features of six patients with VENTANA IHC positive RT-PCR negative NSCLC. By column: Positive of ALK expression with original magnification ×200 by VENTANA IHC, targeted next-generation sequencing of ALK gene demonstrates the BWA of the ALK exon 20 region around the transcription breakpoint (A case 2, B case 5, C case 6, D case 9, E case 12, and F case 15)