Introduction: The Sydney system proposal for the study and reporting of lymphadenopathy by fine-needle aspiration (FNA) constitutes one of the first attempts to standardize this procedure. Here, we review its applicability. Materials and Methods: A retrospective study in which all ultrasound-guided FNAs (USFNAs) of superficial lymphadenopathy (palpable or not) performed by interventional pathologists in 2 specialized hospital centers were quantified over 2 years. The procedure was systematized, and the diagnoses were reclassified according to the Sydney system categories. Results: We analyzed 363 USFNAs of lymphadenopathies. The distribution of cases by categories was as follows: insufficient (n = 13; 3.58%), benign (n = 208; 57.30%), atypia of uncertain significance (n = 7; 1.93%), suspicious (n = 21; 5.79), and malignant (n = 114; 31.40%). The risks of malignancy calculated for categories I, II, III, IV, and V were 27%, 3%, 50%, 100%, and 100%, respectively. Conclusion: The implementation of the Sydney system allows the systematization and standardization of the lymph node FNA methodology, with increased efficacy and efficiency. Assimilating the recommendations enables the qualification of the diagnostic procedure.
Acta Cytologica

中文翻译：

---

介入病理学家超声引导下的浅表淋巴结病细针穿刺：悉尼系统2年经验363例的适用性

介绍：悉尼系统通过细针穿刺 (FNA) 研究和报告淋巴结肿大的提案是对该程序进行标准化的首批尝试之一。在这里，我们回顾一下它的适用性。材料和方法：一项回顾性研究，其中对 2 年内由介入病理学家在 2 个专科医院中心进行的浅表淋巴结病（可触及或不可触及）的所有超声引导下的 FNAs (USFNAs) 进行了量化。该程序被系统化，并根据悉尼系统类别对诊断进行重新分类。结果：我们分析了 363 例淋巴结病的 USFNA。病例按类别分布如下：不足（ n =13；3.58%），良性（ n= 208; 57.30%)、意义不确定的异型性 ( n = 7; 1.93%)、可疑 ( n = 21; 5.79) 和恶性 ( n = 114; 31.40%)。针对 I、II、III、IV 和 V 类计算的恶性肿瘤风险分别为 27%、3%、50%、100% 和 100%。结论：悉尼系统的实施允许淋巴结 FNA 方法的系统化和标准化，具有更高的功效和效率。吸收这些建议可以确定诊断程序。
细胞学学报