Abstract: The current study was observational study undertaken to study sensitivity and specificity of FNAC in a thyroid swelling. It was observed that majority of patients with goiter were in age group 31-40 years. The majority of patients with goiter were females 50 (89.29%) as compared to males 14 (73.68%). The carcinomas were also more prevalent in females as compared to males. The results of thyroid cytology must be assessed in conjunction with the clinical findings and other investigations like TFT and USG findings, in view of the possibility of false negative or false positive cytological diagnosis. The viability and applicability of cell pattern analysis in applying pattern analysis to the understanding of thyroid cytology is also seen in this study.