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Case harboring ALK rearrangement (ALK-R) and ALK-A: (A,B) Hematoxylin and Eosin (H&E) staining (20–40× magnification); (C,D) ALK immunohistochemistry (IHC) positive (20–40× magnification); (E) ALK FISH with ALK-R and ALK-A (63× magnification); (F) ALK ISH mRNA expression, average 4–6 dots/cell (60× magnification).
