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Immunohistochemical analysis of SSTR2 expression in human lung cancer. (A, B) Lung cancers that lack SSTR2 expression. (C, D) Lung cancers with SSTR2 expression (arrow): adenocarcinoma (AC) with high and diffuse SSTR2 expression (C), and squamous cell carcinoma (SQM), with focal and mild SSTR2 expression (D).
