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. 2011 Oct 4;105(9):1338–1341. doi: 10.1038/bjc.2011.405

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Copyright © 2011 Cancer Research UK

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Primary lung adenocarcinoma (patient 6). (A) Cytokeratin 7 immunostaining showing positive tumour cells surrounding negative conjonctive tissue; (B) Vimentin immunostaining performed on a serial section of the same tumour, showing that malignant cells are negative, whereas conjonctive tissue is stained.