낭성 타액선 종양의 수술 전 진단에서 초음파 유도하 세침흡인검사와 비교한 중심바늘생검의 유용성

Abstract

Background and Objectives Accurate preoperative prediction of final histopathologic di agnosis is essential in parotid tumor management, which also includes surgical planning. As a preoperative diagnostic examination for parotid tumors, the accuracy of ultrasound-guided fine needle aspiration (US-FNA) and ultrasound-guided core needle biopsy (US-CNB) was compared, and factors affecting the accuracy of diagnosis and adequacy of the specimen were analyzed. Subjects and Method This study was conducted as a retrospective analysis of 90 patients with parotid tumor who had undergone parotidectomy after pre-operative ultrasound-guided biopsy. We divided the study subjects into US-FNA and US-CNB groups and evaluated the diagnostic accuracy by comparing the pre-operative results with the final istopathologic di agnosis after surgery. In addition, accuracy and specimen adequacy were analyzed according to tumor components. Results The US-FNA group showed significantly higher rates of non-diagnostic results than the US-CNB group (44.0% vs. 13.8%, p=0.002) did. Diagnostic accuracy was also signifi cantly higher in US-CNB than in US-FNA (95.4% vs. 64.0%, p<0.001), and the non-diagnos tic result of US-FNA was the main factor in reducing accuracy. Meanwhile, in both cystic predominant tumors and solid-predominant tumors (94.8% vs. 75%, p=0.023), US-CNB showed significantly better accuracy than US-FNA (100.0% vs. 20.0%, p=0.010) did. Conclusion US-CNB has superiority in both sample adequacy and diagnostic accuracy compared to US-FNA in preoperative diagnosis of parotid tumors, and it seems necessary to consider its use more actively in the diagnosis of cystic-predominant tumors.