The aim of this study was to evaluate thyroid dysfunction in obese children in Korea.Method: We measured body mass index and thyroid hormone in obese, overweight, and normal weight children who visited a pediatric clinic in Jeonju, Korea, from January 2009 to September 2012. Results: The free thyroxoine (FT4) level of the obese group (16.35 ± 2.79 pmol/L) was lower than levels of the overweight (17.65 ± 2.31 pmol/L) and normal weight (17.28 ± 2.35 pmol/L; P=0.012) groups. The average value of FT4 in severely obese children (15.71 ± 1.68 pmol/L) was lower than those of mildly and moderately obese children (16.40 ± 2.88 pmol/L). We found no significant difference in thyroid stimulating hormone level between the obese group and normal weight group.
Conclusion:The FT4 level is lower in obese children than in normal weight children.
An ectopic thyroid occurs when thyroid tissue has not properly migrated from the foramen cecum to the fourth tracheal ring along the midline of the ventral portion of the neck, but instead is located elsewhere. There are some cases of dual-site ectopic thyroid glands, usually involving adolescents or adults. Cases of neonatal dual ectopic thyroid glands are even rarer. We report a case of a dual ectopic thyroid with congenital hypothyroidism found during a neonatal screening of the lingual and upper cervical regions of a patient . The patient had no airway obstruction symptoms, such as dysphagia or grunting. The thyroxine (T4) level was 2.49 μg/dL (normal value: 6.2-22.0 μg/dL) and the thyroid-stimulating hormone (TSH) level was 217.85 μIU/mL (normal value: 1.7-9.1 μIU/ mL). A dual ectopic thyroid was diagnosed based on a Tc-99m thyroid scan. After receiving thyroid hormone replacement therapy, the child has developed normally.
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