posted on 2015-12-18, 11:22authored byJianming Ying, Chen Lin, Jian Wu, Lei Guo, Tian Qiu, Yun Ling, Ling Shan, Haitao Zhou, Dongbing Zhao, Jian Wang, Jianwei Liang, Jianjun Zhao, Yuchen Jiao, Ning Lu, Hong Zhao
A, Immunohistochemistry showed cytoplasmic immunoreactivity for ALK protein expression in a proportion of cancer cells (20×). B-C, ALK protein was only expressed in tumor cells with neuroendocrine differentiation, but not expressed in gastric adenocarcinoma cells, indicating intratumoral heterogeneity (A, 20×; B, 200×). D, fluorescence in situ hybridization (FISH) performed with Vysis LSI ALK Dual color Break-Apart FISH probes showed FISH-negative result as intact fused signals. (1000×).