FNAC of Salivary Gland Tumors

Fine Needle Aspiration Cytology (FNAC) of Salivary Gland Tumors
Introduction:
Salivary gland neoplasms though relatively uncommon are by no means rare, accounting for 3 % of all head and neck tumors. Distribution wise 80% of the tumors occur in parotid gland, 15% in submandibular gland and less than 1% in sublingual glands. The World Health Organization (WHO) has classified the tumors of salivary gland as primary or secondary, malignant or benign and by the tissue of origin. The five broad – categories of salivary gland tumors are: Malignant tumors: e.g. Mucoepidermoid Carcinoma, Acinic cell Carcinoma and Adenoid Cystic Carcinoma, Benign tumors: e.g. Pleomorphic Adenoma, Warthin’s tumor, Myoepithelioma, Soft Tissue tumors: e.g. Hemangioma, Hematolymphoid tumors: e.g. Hodgkin’s Lymphoma & Secondary tumors. Of the malignant tumors Mucoepidermoid Carcinoma is the most common neoplasm occurring most frequently in the parotid gland. Exposure to radiation has been thought to play or role in the development. Adenoid Cystic Carcinoma is the second most frequently encountered malignant tumor of salivary gland.


Several methods have been developed for the screening of salivary gland tumors. The method which has gains immense popularity amongst these in fine needle aspiration cytology (FNAC).  It is a quick and reliable method of evaluating salivary gland lesions. It is minimally invasive, easy to perform and carries virtually no risks of complications except for mild irritation at the site of FNAC.
Diagnosis on FNAC can be difficult, as cytologist picture of different neoplasms show overlapping features so it requires a lot of expertise and experience. It is now used extensively for pre-operative evaluation of the salivary gland tumors and for formulating a suitable treatment plan. The FNAC is used to differentiate between malignant, benign and inflammatory lesions.
Discussion:
In the study of salivary gland tumors were observed in all age groups. However surprisingly diagnosed a malignant tumor in a 45 days old female patients and 40 to 50 days old male patients.  

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