Age Dynamics of Changes in Thyroid Volume

Age dynamics of increase in thyroid volume (TV) was studied in healthy persons of both sex. TV was determined based on ultrasound measurements of three linear parameters : length (a), width (b) and thickness (c). TV was calculated with the formula : TV = 2×(0.524×a×b×c). There were 5291 males and 6153 females, whose ages ranged from 3-31 years. Following parameters were studied : absolute increase of TV, growth rate and increase rate of TV, relative growth rate of TV. TV growth was found to be irregular in different age periods. Differences in TV growth between men ane women as well as age periods of the most marked TV growth were ascertained. The obtained results allow to evaluate changes in TV in healthy persons most objectively