To Assess The Sonographically Measured Thyroid Volume In Type-I Diabetic Patients With Normal Serum TSH Level And Healthy Control Subjects And Correlation With On Age, Sex, Height And Body Weight In Both Groups. This prospective study was carried out in the Department of Radiology and Imaging, BlRDEM, Dhaka, Bangladesh during the period of 1st June 2009 to 30th May, 2010, to compared the thyroid volume evaluated by ultrasonography in type I diabetic patients with normal TSH value and healthy control subject and find out the correlation of thyroid volume with age, sex, body weight and height in both groups. For this purpose, 35 consecutive patients having type I diabetes with normal serum TSH level and 35 healthy control subjects were included in this study. Ultrasonography was done in all these patients and healthy control subjects to evaluate the thyroid volume. The following observations and results were obtained in this study: The mean age was 19.7±5.4 years and 19.3±5.9 years in group I and group II respectively, which was almost similar between two groups. Male female ratio was 1:1.3 and 1:1.1 in group I and group II respectively. The mean height and weight were almost similar in both groups.The thyroid volume increased with age in both groups. The mean±SD thyroid volume were 7.9±0.7cc, 8.0±0.5 cc, 9.0±0.4 cc and 9.4±0.3 cc in 10-15 years, 16-20 years, 21-25 years and 26-30 years age group respectively in type I diabetes patients. Similarly, in healthy control subjects the mean thyroid volume were 2.2±1.0 cc, 2.3±0.4 cc, 4.3±0.5 cc and 4.6±0.7 cc in 10-15 years, 16-20 years, 21-25 years and 26-30 years age group respectively. The thyroid volume higher in female in both groups. The mean±SD thyroid volume was 8.3±0.7 cc and 8.6±0.9 cc in male and female respectively in type I diabetes patients. In healthy control subjects the mean±SD thyroid volume was 3.0±1.3 cc and 3.3±1.4 cc in male and female respectively. In this study the mean±SD thyroid volume ............