In the 'Lab Values - Hormones' section of our in-depth questionnaire we ask the following question about your Total T4 level:
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T4 (Total). Unit: ug/dL [nmol/L]
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Your answer |
...indicates |
...and suggests |
| 1. |
"Don't know" |
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| 2. |
"Under 4.5 [58] (low)" |
Having low TT4 level |
A symptom |
| 3. |
"4.5 to 5.9 [58-76] (low - normal)" |
Having low-normal TT4 level |
A symptom |
| 4. |
"6.0 to 11.5 [77-148] (normal)" |
Having normal TT4 level |
A symptom |
| 5. |
"Over 11.5 [148] (elevated)" |
Having elevated TT4 level |
A symptom |
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Your answer will affect the likelihoods of the conditions below.
Any answers in green reduce the likelihood of the condition.
GLOSSARY
Deciliter (dL)
0.1 or one tenth of a liter.
Microgram (mcg, Micrograms, ug)
0.000001 or a millionth of a gram.
mol (mmol, nmol, pmol, umol)
Mole. The amount of a substance that contains as many atoms, molecules, ions, or other elementary units as the number of atoms in 0.012 kilograms of carbon 12. The number is 6.0225 × 10^23, or Avogadro's number. Also called gram molecule.
mmol: millimole: 0.001 or one thousandth of a mole.
umol: micromole: 0.000001 or one millionth of a mole.
nmol: nanomole: 0.000000001 or one billionth of a mole.
pmol: picomole: 0.000000000001 or one trillionth of a mole.
Pituitary (Pituitary Gland)
The pituitary gland is a small (half-inch), bean-shaped organ that hangs down from the lower center of the brain on a stalk attached to another gland, the hypothalamus. Weighing less than one gram, the pituitary gland is often called the "master gland" since it controls the secretion of hormones by other endocrine glands. It regulates many body activities, and is partitioned into front and back lobes. The front lobe is stimulated by the hypothalamus, and produces any one of six different hormones that in turn stimulate the thyroid, adrenal and reproductive glands, and also breast milk production.
Thyroxin (T4)
A thyroid hormone also prepared synthetically, for treatment of hypothyroidism and myxedema.
Last updated: May 10, 2007
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