Term
| In Graves disease, a radioiodide scan would show what? |
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Definition
| DIFFUSE UPTAKE (because every thyroid cell is hyperfunctioning) |
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Term
| What is Plummer's disease? |
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Definition
| multinodular toxic goiter - characterized by hyperfunctioning areas that produce high T4 and T3 levels thereby decreasing TSH. As a result, the rest of the thyroid is not functioning (atrophy due to decreased TSH) |
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Term
| What will appear on a radioiodide scan with Plummer's disease? |
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Definition
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Term
| What are three signs specific to GRAVE'S disease? |
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Definition
exopthalmos
pretibial myxedema
thyroid bruit |
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Term
| What causes the proptosis in GRAVE'S disease? |
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Definition
| edema of the extraocular muscles and retro-orbital tissue |
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Term
| What is pretibial myxedema and what causes it? |
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Definition
| edema over tibial surface due to dermal accumulation of mucopolysaccharides |
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Term
| Is measuring T3 necessary in the workup for HYPERthyroidism? |
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Definition
| usually unnecessary, but may be helpful if TSH and T4 are normal |
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Term
| What is the importance of radioactive T3 uptake? |
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Definition
| it helps differentiate between elevations in thyroid hormones due to increased TBG from true hyperthyroidism |
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