Study the clinical characteristics, endoscopy, histopathology, expression of proteins p53, Ki67, Her- 2/neu in colorectal cancer and colorectal polyps greater than or equal to 10 mm; study the relationship between the expression of proteins p53, Ki67 and Her- 2/neu with histopathological characteristics, lymph node metastasis in colorectal cancer and colorectal polyps greater than or equal to 10 mm.