RT Book, Section A1 Bansal, Nidhi A1 Athanassaki, Ioanna A2 Kline, Mark W. SR Print(0) ID 1182919521 T1 Other Disorders of the Thyroid T2 Rudolph's Pediatrics, 23e YR 2018 FD 2018 PB McGraw-Hill Education PP New York, NY SN 9781259588594 LK accesspediatrics.mhmedical.com/content.aspx?aid=1182919521 RD 2024/04/19 AB Goiter can present at any age in children. The most common cause of goiter formation in the United States is autoimmune thyroiditis. In neonates, the normal thyroid size has been reported as 0.9 ± 0.2 mL. In older children from iodine sufficient areas, it is 3.1 to 6.3 mL. The “rule of thumb” is also used to determine thyroid size: each lobe should be the size of the terminal phalanx of the child’s thumb.