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Immunohistochemical staining of insulin-like growth factor-1 and insulin-like growth factor-1 receptor in colorectal cancer tissues. A: Tumor-adjacent normal tissues; B: Moderately differentiated CRC and C, poorly differentiated CRC (× 200). IGF-1: Insulin-like growth factor-1. IGF-I R: Insulin-like growth factor-1 receptor; CRC: Colorectal cancer.
