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NK cell homing and interaction with tumor cells. (A) Representative image of a thick brain section stained with DAPI to identify the tumor and NK cell interaction zone. (B) 3-Dimentional confocal imaging showing deep penetration of PKH-labeled NK cells into the tumor (GFP-labeled tumor cells). (C) An overview of NK cells (red spheres) and tumor cells (green spheres) as reconstructed by Imaris software.
