Fine Needle Aspiration of Thyroid Nodules by The Bethesda System for Reporting Thyroid Cytopathology (TBSRTC) and its Correlation with Ultrasound Features.
European Journal of Molecular & Clinical Medicine,
2022, Volume 9, Issue 3, Pages 1687-1695
Abstract
Background: Fine-needle aspiration cytology (FNAC) is the initial screening test for thyroid nodules. The Bethesda system classifies thyroid FNAC into six categories. Each category is linked to a malignancy risk and has a recommended clinical management. The aim of this study was to analyze the thyroid cytology smears by Bethesda system and to correlate the diagnosis of cytopathology with ultrasound features.Materials and Methods: This study was conducted at a tertiary care teaching hospital in Patna for 6 months from May 2019-October 2019. Institute ethics committee approval was taken. The study included 100 patients attending the pathology department for cytology of thyroid lump after direct or ultrasound guided FNAC.
Results: 8 patients (8%) were in category I. Out of 8 , 2 cases contained cyst fluid only, 2 had excessive blood obscuring the smear and 4 cases had scant cellularity. 64 patients (64%) were in category II. Among the 64 cases, 42 were labelled as goitre, 18 as lymphocytic thyroiditis, and 4 cases as granulomatous thyroiditis. 10 patients (10%) were in category III. Out of this, 2 cases had Atypia of undetermined significance and 8 cases had follicular lesion of undetermined significance. 8 cases(8%) were in category IV . Out of this, 6 cases were labelled as Follicular neoplasm and 2 as suspicious for follicular neoplasm. 2 cases (2%) were in category V and were labelled as suspicious for papillary carcinoma. 8 cases (8%) were in category VI (malignant), out of this 4 were labelled as papillary carcinoma and 4 as anaplastic carcinoma of thyroid.
Conclusions: Fine-needle aspiration cytology (FNAC) of thyroid is a good initial screening test for thyroid nodules The Bethesda System for Reporting Thyroid Cytopathology proved to be an excellent reporting system.
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