what is subclinical hyperthyroidism
Subclinical hyperthyroidism is characterized by circulating thyrotropin (thyroid-stimulating hormone; TSH) levels below the reference range and normal serum thyroid hormone levels (1). The diagnosis is primarily biochemical and depends on the definition of ânormalâ TSH levels.xogenous subclinical thyrotoxicosis: This is the most common type of subclinical hyperthyroidism. Irrespective of the cause of hypothyroidism, thyroid blood tests in overtreated hypothyroid patients show results consistent with those of subclinical hyperthyroidism.