病例报告 [例1] 住院号141140,女性,57岁。因大便习惯改变三年和大便带血一周于1974年6月10日入院。体检发现直肠前壁距齿状线4cm处有直径2cm“息肉”一枚,质硬,表面有糜烂。6月15日作“息肉”切除。病理检查见肿瘤以大上皮样细胞为主。核仁明显,核分裂相易见。胞浆淡红色,含有黑色素颗 Case report [Example 1] Hospital number 141140, female, 57 years old. The hospital was admitted to hospital on June 10, 1974 due to changes in bowel habits for three years and blood for stools. The physical examination revealed that the anterior wall of the rectum was 4 cm in diameter with a 2 cm diameter “polyp” from the dentate line, which was hard and had erosions on the surface. June 15 as a “polypectomy.” Pathological examination showed that the tumor was mainly epidermis-like cells. The nucleolus is obvious and the karyolysis is easy to see. The cytoplasm is reddish and contains melanin pigments