SCH is characterized by normal T4 and mildly elevated TSH (5-10 mU/L). SCH is common in children, especially during newborn screening. About 2.5% of normal individuals maintain TSH above upper normal range
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Thyroid gland produces insufficient thyroid hormone. Thyroid controls metabolism and affects body functions. Symptoms include fatigue, weight gain, and cold sensitivity
Endocrine system controls almost all body functions through hormone production. Glands release hormones into bloodstream to coordinate processes. System affects metabolism, growth, development, emotions, and sleep
Diagnosis requires blood tests measuring TSH and thyroid hormone levels. High TSH with low T-4 indicates hypothyroidism. Subclinical hypothyroidism shows high TSH but normal hormone levels. Blood test results can be affected by certain medications