Fig. 3From: ALK-rearranged lung squamous cell carcinoma responding to alectinib: a case report and review of the literatureAnaplastic lymphoma kinase testing. a Immunohistochemical analysis revealed anaplastic lymphoma kinase positive protein expression. b Fluorescence in situ hybridization revealed a deletion of the 5′ signal with retained 3′ signal (arrows), consistent with an anaplastic lymphoma kinase rearrangementBack to article page