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Figure 2 | BMC Cancer

Figure 2

From: Mechanisms of acquired resistance to EGFR-tyrosine kinase inhibitor in Korean patients with lung cancer

Figure 2

Increased CD56 expression in two patients. (A) The initial biopsy showed typical adenocarcinoma in H&E staining. (B) There were no significant morphological changes of tumor cells with persistent immuno-positivity for TTF-1 after resistance. (C) The expression of CD56 was negative in initial sample. (D) CD56 expression in some cells of tissues obtained after resistance was increased.

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