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FISH ALK results: (A) FISH ALK wild-type (100× magnification); (B) FISH ALK gene copy number gain (ALK-CNG) (100× magnification); (C) FISH ALK amplification (ALK-A) with ≥6 signals/cell (100× magnification); (D) FISH ALK-A with 8–12 signals/cell (100× magnification).
