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  Indian J Med Microbiol
 

Figure 1: (a and b) Biopsy from intrathoracic mass with positivity for CK7 (c) and TTF-1 (d) diagnosed as adenocarcinoma, (e and f) negative for epidermal growth factor receptor protein expression for clone specific immunohistochemistry, (g) negative for anaplastic lymphoma kinase protein expression using D5F3 clone, (h and i) cell block with clusters of tumor cells, (j) negative staining for anaplastic lymphoma kinase protein on cell block, (k and l) Negative staining with clone-specific epidermal growth factor receptor immunohistochemistry on cell block (a and h: haematoxylin and eosin x100, ×100, b and i: haematoxylin and eosin x100, c–g and j–l: DAB, ×100)

Figure 1: (a and b) Biopsy from intrathoracic mass with positivity for CK7 (c) and TTF-1 (d) diagnosed as adenocarcinoma, (e and f) negative for epidermal growth factor receptor protein expression for clone specific immunohistochemistry, (g) negative for anaplastic lymphoma kinase protein expression using D5F3 clone, (h and i) cell block with clusters of tumor cells, (j) negative staining for anaplastic lymphoma kinase protein on cell block, (k and l) Negative staining with clone-specific epidermal growth factor receptor immunohistochemistry on cell block (a and h: haematoxylin and eosin x100, ×100, b and i: haematoxylin and eosin x100, c–g and j–l: DAB, ×100)