Labels:text | screenshot | black and white | black | font | document OCR: ating In secondary hypothyroidism, low circu e of TSH thyroid hormone levels are due to failur 15.31). output as a result of pituitary disease (Fig H levels. The T4 levels are low, as are the basal TS There is no TSH response to exogenous H response severe pituitary failure, but a blunted TS 'RH in ease. The may still occur in less-severe pituitary di evels, as in T3 levels may be normal despite low T4 primary hypothyroidism, therefore the stic test for measurement of T3 is not a good diagno ents have hypothyroidism of any origin. Some pat This mildly elevated TSH levels (6-10uu/ml) he TSH hasparadox is explained by the finding that low biological activity, since the normal RH, and thyrotrophs are not being stimulated by the TSH is abnormally glycosylated
(.png)
