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• W3108709251 abstract "The adenoma-carcinoma sequence in thyroid nodules is an enigmatic phenomenon. Genomics is the only definitive modality to resolve this hypothesis. Adenomas and papillary carcinomas tend to have mutations in RAS and highly specific BRAF gene respectively. In this context, we set out study the prevalence and clinical significance of these somatic mutations in surgical tissue samples.This retrospective study was conducted on surgically managed thyroid nodule patients. Institutional ethical committee approval was obtained. Diagnosis was based on biochemical confirmation, imaging, fine needle aspiration cytology and later confirmed by histopathology. We selected 100 benign thyroid adenomas (BTA) and 100 papillary thyroid carcinoma (PTC) cases. Archived tumour tissue samples of selected cases were retrieved. After appropriate processing of samples, DNA extraction, cDNA preparation, PCR amplification, application of 4 sets of Primers were performed as part of mutational analysis of RAS (H-,K-,N-) and BRAF genes.Homozygous mutations in N-RAS were found in 36/100 (36%) of BTA and 7/100 (7%) of PTC cases. No H-RAS or K-RAS mutations were found in both groups. Homozygous mutations were found in BRAF gene in 4/100 (4%) of BTA cases and 52/100 (52%) of PTC cases. The differences were statistically significant.Similar N-RAS and BRAF mutations were prevalent in both benign and malignant thyroid nodules giving some evidence for linkage between them. Though not robust, we opine that there is possibility of adenoma-carcinoma sequence in thyroid nodules." @default.
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• W3108709251 date "2020-12-01" @default.
• W3108709251 modified "2023-10-14" @default.
• W3108709251 title "Is there adenoma-carcinoma sequence between benign adenoma and papillary cancer of thyroid: A genomic linkage study" @default.
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• W3108709251 doi "https://doi.org/10.1016/j.amsu.2020.11.069" @default.
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