<unk>  is a condition which is seen in severe illness such as burns, malignancy, sepsis, myocardial infarction, pneumonia and cirrhosis. The thyroid gland itself is normal. In these conditions the body goes into a state of hypermetabolism leading to increased muscle and calorie loss. It is speculated, that the body in order to contain this hypermetabolism induces some degree of hypothyroidism by inhibiting conversion of  thyroxine (T4) to triiodothyronine (T3). Initially<unk>  presents with low serum T3 (triiodothyronine). Depending upon the severity and duration of the stress inducing condition, the thyroid-stimulating hormone(TSH), thyroxine (T4), and free T4 (FT4) are affected in variable proportions. The drop in levels of T3 and T4(thyroxine) are more with more severe illnesses. Usual symptoms include fatigue and weakness, weight gain, puffy face, cold intolerance, constipation and bradycardia. It may result in infertility in adults. Blood tests of thyroid-stimulating hormone (TSH) level and T4 (thyroxine) level are very important for the diagnosis of<unk> . Treatment includes rapid correction of the underlying illness.
Euthyroid sick syndrome
Thyroid storm
Cushing's syndrome
Secondary adrenal insufficiency
Acromegaly
Diabetic ketoacidosis
Adie syndrome
Stress hyperglycemia