GIÁ TRỊ CỦA HỆ THỐNG MILAN TRONG CHẨN ĐOÁN TẾ BÀO HỌC U TUYẾN MANG TAI

Abstract

Introduction: In Vietnam, the Milan Classification System has been widely applied in the cytological diagnosis of parotid gland tumors (PGTs), contributing to the estimation of malignancy risk and neoplastic potential. This study was conducted to evaluate the diagnostic value of the Milan System in fine-needle aspiration cytology (FNAC) by comparing cytological results with histopathological findings in cases of parotid gland tumors. Methods: This is a cross-sectional descriptive study conducted on patients diagnosed with parotid gland tumors at the Department of Otorhinolaryngology, University Medical Center Ho Chi Minh City. Results: From January 2021 to May 2024, we collected data from 157 patients with parotid gland tumors, of which 151 had unilateral tumors and 6 had bilateral involvement. Regarding the diagnostic value for malignancy risk, the Milan System demonstrated high sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and overall accuracy. Notably, specificity, NPV, and accuracy were all above 90%. For neoplastic risk assessment, the Milan System also showed high sensitivity, specificity, PPV, and accuracy (all over 90%); however, the NPV was relatively low at 55.56%. Conclusion: The Milan System has proven to be highly valuable in distinguishing between benign and malignant lesions, as well as in identifying cases that fall into indeterminate categories.