细胞学细外吸法(FNA)是诊断恶性疾病的一种组织取样方法,它与微量活检法相似,但可代替组织学样本,而获得细胞学涂片。自1977年以来,Bernd-Uwe Sevin等人在美国迈阿密大学对FNA作为原发和复发肿瘤的诊断方法进行了评价。第一阶段需建立组织学与FNA细胞学之间的相互关系。在最初的140例患者中,总的病理学诊断良性和恶性肿瘤的准确率是94.5％;对恶性肿瘤的特异性是97％。此器械构造简单,在应用 Fine-cell external aspiration (FNA) is a tissue sampling method for diagnosing malignant disease. It is similar to microbiopsy, but it can replace a histological sample to obtain a cytological smear. Since 1977, Bernd-Uwe Sevin et al. at the University of Miami in the United States evaluated FNA as a diagnostic method for primary and recurrent tumors. The first phase needs to establish the relationship between histology and FNA cytology. In the original 140 patients, the total pathological diagnosis of benign and malignant tumors was 94.5%; the specificity for malignant tumors was 97%. This device is simple in construction and used in applications