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144 Possible Causes for Free T4 Increased

  • Hyperthyroidism

    […] thyroxine level (FT4) ( CMAJ 2003;168:575 ) 10% of patients have an increased total or free T3 level and normal T4 level with suppressed TSH level, a condition called "T3[] […] free T4 Associated with early treatment of hyperthyroidism with antithyroid drugs T4 hyperthyroidism : high T4, normal T3 Due to primary hyperthyroidism causes, also iodine[] […] hormone overreplacement ( Eur J Endocrinol 2005;152:1 ) Excessive thyroid hormone may be due to differentiated thyroid cancer ( Eur J Endocrinol 2005;152:1 ) Patients have increased[]

  • Pituitary Adenoma

    Prevalence data are important for assessing the burden of disease on the health care system; data on pituitary adenoma prevalence are very scarce. The objective of the study was to measure the prevalence of clinically relevant pituitary adenomas in a well-defined population. This was a cross-sectional, intensive,[…][]

  • Endogenous Depression

    In conclusion, levels of free T4 and free rT3 in the cerebrospinal fluid are increased during depression compared with levels after recovery, probably reflecting an increased[] T4 and rT3.[] […] supply of T4 from serum and an increased production of rT3 from T4 in the brain.[]

  • Goiter

    T3 and total and free T4 levels Imaging Neck ultrasound will reveal one or more nodules.[] Key laboratory and imaging tests Low/suppressed serum TSH concentrations with elevated serum total and free T3 and T4 levels.[] Increased radionuclide uptake in the nodule(s) concomitant with a decreased uptake in the surrounding extranodular thyroid tissue.[]

  • Vomiting of Pregnancy

    free thyroxine (T4) (Hershman, 1999) with concomitant gestational thyrotoxicosis occuring in some women with hyperemesis gravidarum (Panesar et al, 2001), which may also[] […] including oestrogen, progesterone (Gadsby et al, 2000) and human chorionic gonadotrophin (hCG) (Glick and Dick, 1999). hCG appears to decrease thyroid-stimulating hormones and increase[]

  • Cutaneous Candidiasis

    A suggestive clue can only be obtained by increased serum TSH in presence of normal serum T4, T3 resin uptake and FTI (Free Thyroxine Index).[]

  • Acidosis

    A thyrotropin and a free T4 level should be considered in selected patients, since hypothyroidism may cause obesity, leading to obstructive sleep apnea (OSA) and sleep apnea–related[] The most common abnormal serum electrolyte finding in chronic respiratory acidosis is the presence of a compensatory increase in serum bicarbonate concentration.[] […] respiratory acidosis or other acid-base disorders. [4] The most common abnormal serum electrolyte finding in chronic respiratory acidosis is the presence of a compensatory increase[]

  • Hypothyroidism

    If serum free T3 is too low, an increase of L-T3 dose is logical, as a higher L-T4 dose is likely to increase serum free T4.[] The percentage of patients with an abnormally high free T4/free T3 ratio increased with increasing L-T4 dose (24.4, 31.1 and 37.7% in patients treated with a L-T4 dose of[] […] end up increasing the imbalance of serum free T4 to free T3 ratio [ 67 ].[]

  • Hospital Addiction Syndrome

    […] syndrome Surreptitious steroid administration HPLC to differentiate endogenous and exogenous steroids Hyperthyroid Surreptitious thyroxine administration Blood tests for free[] T4 and thyroid stimulating hormone Hypoglycaemia Exogenous insulin or insulin secretagogues Simultaneous blood analysis of insulin, C-peptide, proinsulin, and insulin secretagogues[] […] liquid chromatography (HPLC) analysis of urine Urine chloride analysis Catecholamine-secreting tumor Injection of epinephrine into urine or blood stream Adjunct analysis of increased[]

  • Atrial Arrhythmia

    Therefore, a blood test for analysis of thyroid-stimulating hormone (TSH) and free T4 levels is usually recommended.[] Firstly, atrial fibrillation is associated with increased risk of stroke.[]

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