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KMID : 0361020230660080532
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Korean Journal of Otolaryngology - Head and Neck Surgery
2023 Volume.66 No. 8 p.532 ~ p.540
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The Usefulness of Ultrasound-Guided Core Needle Biopsy Compared to Fine Needle Aspiration in Pre-Operative Diagnosis of Cystic-Predominant Parotid Tumors
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Cho Youn-Jin
Jo Young-Rok
Hong Hyun-Jun
Lee Hye-Ran
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Abstract
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Background and Objectives Accurate preoperative prediction of final histopathologic di-agnosis is essential in parotid tumor management, which also includes surgical planning. As apreoperative diagnostic examination for parotid tumors, the accuracy of ultrasound-guidedfine needle aspiration (US-FNA) and ultrasound-guided core needle biopsy (US-CNB) wascompared, and factors affecting the accuracy of diagnosis and adequacy of the specimen wereanalyzed.
Subjects and Method This study was conducted as a retrospective analysis of 90 patientswith parotid tumor who had undergone parotidectomy after pre-operative ultrasound-guidedbiopsy. We divided the study subjects into US-FNA and US-CNB groups and evaluated thediagnostic accuracy by comparing the pre-operative results with the final histopathologic di-agnosis after surgery. In addition, accuracy and specimen adequacy were analyzed accordingto tumor components.
Results The US-FNA group showed significantly higher rates of non-diagnostic results thanthe 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-CNBshowed 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 accuracycompared to US-FNA in preoperative diagnosis of parotid tumors, and it seems necessary toconsider its use more actively in the diagnosis of cystic-predominant tumors.
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KEYWORD
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Core needle biopsy, Cystic neoplasms, Fine needle aspiration, Parotid neoplasm, Ultrasonography
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