A and B, two blocks from the original specimen used for TMA demonstrated areas with varying patterns of ALK rearrangement and KRAS mutation status. A and.

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A and B, two blocks from the original specimen used for TMA demonstrated areas with varying patterns of ALK rearrangement and KRAS mutation status. A and B, two blocks from the original specimen used for TMA demonstrated areas with varying patterns of ALK rearrangement and KRAS mutation status. Red-circled areas indicate ALK rearranged and mutated KRAS (ALK+/KRAS+). Blue-circled areas indicate ALK wild-type and KRAS mutated (ALK−/KRAS+). Green-circled areas indicated ALK rearranged and KRAS wild-type (ALK+/KRAS−). Black areas indicate wild-type for both alterations (ALK−/KRAS−). C and D, higher magnification of the regions indicated in E by yellow arrows demonstrates that some regions are best classified as high-grade dysplasia. FISH analysis in region C was positive for ALK rearrangement and FISH analysis in region D was negative for ALK rearrangement (FISH images not shown). Dara L. Aisner et al. Mol Cancer Res 2014;12:111-118 ©2014 by American Association for Cancer Research