Fine-Needle Aspiration Biopsy (FNAB) is the most-widely used procedure for the pathological diagnosis of nodules of the thyroid gland. FNAB is a very practical and cheap means of understanding the nature of these nodules to help the clinician in the therapy process, whether it be medical or surgical. During this study, 1130 nodules located at the thyroid glands of 899 patients were biopsied by means of FNAB, and their pathological results were evaluated. The data which came out from this study possesses valuable clues to the understanding of the nature of these nodules, and is being presented in this article.
 

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