Predominant acinar adenocarcinoma with adjacent normal alveoli. A H & E (original magnification x100). B The cytoplasm and membrane of the tumor cells were stained strongly with L858-specific antibody. In contrast, the adjacent normal alveolar epithelial cells were completely negative (original magnification x100).
Xiong et al. Diagnostic Pathology 2013 8:27 doi:10.1186/1746-1596-8-27