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Abstract
Introduction  Actually, thyroid volume >25 ml, obtained by preoperative ultrasound evaluation, is a very important exclusion criteria for
minimally invasive thyroidectomy. So far, among different imaging techniques, two-dimensional ultrasonography has become the
more accepted method for the assessment of thyroid volume (US-TV). The aims of this study were: (1) to estimate the preoperative
thyroid volume in patients undergoing minimally invasive total thyroidectomy using a mathematical formula and (2) to verify