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. 2023 May 27;18:70. doi: 10.1186/s13000-023-01357-1

Fig. 2.

Fig. 2

Microscopic pictures. a Hematoxylin azophloxine saffron (HAS) staining (400x). Adenocarcinoma with confirmed ROS1 fusion. b Same case with strong and diffuse positivity with D4D6 (400x). c FISH Arrow: Split signals. Arrowhead: One fused signal and one single green signal. d Strong and diffuse positivity with SP384 (400x)