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J Cytol. 2020 Jan-Mar;37(1):12-17. doi: 10.4103/JOC.JOC_68_18. Epub 2019 Dec 23.

Fine-Needle Aspiration Cytology of Salivary Gland Lesions: A Revised Classification Based on "Milan System"-4years Experience of Tertiary Care Cancer Center of South India.

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1
Cytology and Histopathology Division, Kidwai Cancer Center, Bangalore, Karnataka, India.

Abstract

Background:

Fine-needle aspiration cytology plays role in preoperative diagnosis of any salivary gland mass lesions. Because of heterogeneity of salivary gland lesions and cytomorphology overlap, a uniform 6-tier Milan classification proposed which could be helpful in better communication of reports for patient's management.

Methods:

Study included 4 years (2011-2015) retrospective data retrieval from cytology department of our Institute, which is a tertiary care cancer center of South India. Histopathology correlation was done wherever possible.

Result:

Total 253 cases were studied. Histopathological follow-up was available in 115 cases. Cases were categorized as nondiagnostic (1.58%), nonneoplastic (13.43%), benign (30%), atypia (0.8%), and suspicious for malignancy and malignant cytology (51.8%). The risk for malignancy was high for suspicious for malignancy and malignant cytological categories ranged from 96-100%. The sensitivity, specificity, and accuracy for diagnosing malignancy varied from 86.76%, 93.75%, and 89%, respectively.

Conclusion:

Risk stratification approach in classifying salivary gland cytology aspirate as per Milan system provides a standardized reporting and better communication to clinician.

KEYWORDS:

Fine-needle aspiration cytology; Milan system; salivary gland; sensitivity; specificity

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