活检是指吸取、钳取、切取部分或全部病变组织制成细胞涂片或病理组织切片,通过显微镜观察有无癌细胞的方法。大多数恶性肿瘤必须经病理诊断方能诊断确切,如胃镜检查时,若有胃粘膜严重溃疡,不钳取部分组织活检,就难以确诊;宫颈癌的早期临床表现常为宫颈糜烂, Biopsy refers to the method of sucking, grasping, and cutting out part or all of the diseased tissue to make a cell smear or pathological tissue section and observing the presence or absence of cancer cells by a microscope. Most malignant tumors must be diagnosed by pathological diagnosis. For example, if gastroscopy is severe, it is difficult to diagnose if there is severe ulcer of the gastric mucosa without taking some tissue biopsy. The early clinical manifestations of cervical cancer are often cervical erosion.