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Background: Thyroid fine needle aspiration cytology (FNAC) is an important diagnostic tool for thyroid disorders. The Bethesda technique for Reporting Thyroid Cytopathology (TBSRTC) is an unambiguous, six-category reporting system for thyroid fine needle aspiration (FNA) that is widely acknowledged as a standard reporting guideline for institutes across continents which can minimize needless surgeries. Material and Methods: The study was carried out at the Pathology Department of the Assam Medical College and Hospital, Dibrugarh, Assam, India, from March 2023 to February 2024. The aim is to study the different cytological pattern in thyroid lesion by FNAC The results are interpreted using the features and categories specified in the TBSRTC. A total of 182 cases were studied. The distribution of the various categories from evaluated thyroid FNAs are as follows: nondiagnostic/unsatisfactory-8.2%, benign-75.9%, atypia of undetermined significance-6.0%,follicular neoplasm (FN) or suspicious for a FN-4.3%,suspicious for malignancy - 1%, malignant - 4.3%.Conclusion: The results of a FNA according to The Bethesda System for Reporting Thyroid Cytopathology (TBSRTC) give a standard and systematic approach to managing these nodules. Its standardized nomenclature enhanced thyroid FNAC reporting by facilitating communication and interlaboratory agreement among cytopathologists and clinicians, potentially leading to more standardized patient care management. [ABSTRACT FROM AUTHOR]

Background: FNAC is considered as an excellent non-invasive technique for diagnosis of thyroid lesions. FNAC also help in guiding the clinician for further management of patient with thyroid lesions. Aim: This study was carried out for classifying various thyroid lesions on the basis of "The Bethesda System for Reporting Thyroid Cytopathology". Materials and Methods: This retrospective study was performed on 81 patients in the Department of Pathology, Maharaja Agrasen Medical College, Agroha. FNAC was performed by using non-aspiration technique. The smears were prepared, processed with routine stains and classified them according to the Bethesda system. Results: The ratio of male to female was 1:4.4 and most common affected age group was 30- 50 years. According to the Bethesda system, out of 81 cases 2.46% (n=2) were diagnosed as non-diagnostic/unsatisfactory, 86.41% (n=70) were benign, 1.23% (n=1) were AUS/FLUS, 4.93% (n=4) were FN/SFN, 1.23% (n=1) were suspicious for malignancy and 3.7% (n=3) were reported as malignant. Conclusion: FNAC is simple, easy to perform and painless procedure for diagnosis of thyroid lesion. "The Bethesda system for Reporting Thyroid Cytopathology" is useful in classifying benign and malignant lesions and also allows standardization in reporting which further provides medical and surgical management. [ABSTRACT FROM AUTHOR]