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二、肿瘤性大肠息肉(一)腺瘤前文已提及腺瘤是结肠癌的前期病变,及时检出和摘除对大肠癌的早期防治有重要意义。按照大体形态和组织学生长方式,腺瘤又可分为以下三种:1.腺管型腺瘤:典型者肉眼见为有蒂的球形息肉,表面有浅裂而呈分叶状,因出血呈粉白间暗红色。镜下见腺管紧密排列,其间仅隔少量固有膜。随分化程度不同,腺管可呈规则管状或不规则的随分化程度不同,腺管可呈规则管状或不规则
Second, tumorous colorectal polyps (a) adenomas Previously mentioned adenomas are precancerous lesions of colon cancer, timely detection and removal of colorectal cancer has important significance for the early prevention and treatment. According to the general morphology and organization of student long way, adenomas can be further divided into the following three types: 1. Adenocarcinoma type adenomas: typical globle spherical polyps seen on the naked eye, the surface has a shallow split and lobulated, due to bleeding It is dark red between pink and white. Under the microscope, the glandular ducts are closely arranged with only a few underlying membranes separated. With different degrees of differentiation, the ducts can be in regular or irregular shape with different degrees of differentiation. The ducts can be regular tubes or irregular