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What does a low thyroid uptake mean?

What does a low thyroid uptake mean?

A low uptake of tracer by the thyroid gland may mean that hyperthyroidism is caused by inflammation of the thyroid gland (thyroiditis), taking too much thyroid medicine, or another rare condition.

What causes low iodine uptake?

Lower-than-normal uptake may be due to: Factitious hyperthyroidism (taking too much thyroid hormone medicine or supplements) Iodine overload. Subacute thyroiditis (swelling or inflammation of the thyroid gland)

What is a normal thyroid uptake percentage?

Normal and Critical Findings The normal values of thyroid uptake of radiotracer are 3 to 16% at 6 hours and 8 to 25% at 24 hours. These values may change according to laboratory standard techniques or patient dietary habits. The thyroid gland can uptake more or less than normal.

Can a thyroid uptake detect cancer?

A thyroid uptake and scan is a diagnostic imaging scan that allows the radiologist to determine the function of the thyroid. This scan can determine if the patient has thyroid cancer: persistent or recurrent disease, hyperthyroidism and thyroid nodule or goiter assessment.

Why is iodine uptake low in thyroiditis?

In subacute thyroiditis, radioiodine uptake is low (< 1-2% at 24 h), reflecting thyrotoxicosis due to a discharge of preformed stores of thyroid hormone and resulting from an increase in synthesis (see the image below).

How long are you radioactive after a thyroid uptake scan?

You are asked to ingest (swallow) radioactive iodine (I-123 or I-131) in liquid or capsule form. After a time (usually 6 and 24 hours later), you must return to have the radioactivity measured. A gamma probe is placed over the thyroid gland in the neck to measure the amount of radioactivity in the thyroid gland.

Is a thyroid uptake scan necessary?

The most common reasons for these tests are to look for overactive (hyper) thyroid, underactive (hypo) thyroid or inflammation of the thyroid. If you have an overactive thyroid, the uptake and scan results may be used to plan radioactive therapy.

Can you see thyroid cancer on an ultrasound?

An ultrasound may show your doctor if a lump is filled with fluid or if it’s solid. A solid one is more likely to have cancerous cells, but you’ll still need more tests to find out. The ultrasound will also show the size and number of nodules on your thyroid.

Is a thyroid uptake scan safe?

There’s a small but safe amount of radiation contained in the radionuclide used in any thyroid scan. Your exposure to radiation will be minimal and within the acceptable ranges for diagnostic exams. There are no known long-term complications of having a nuclear medicine procedure.

How long do you have to be isolated after radioactive iodine?

Depending on state regulations, patients may have to stay isolated in the hospital for about 24 hours to avoid exposing other people to radiation, especially if there are young children living in the same home.

What is the cost of a thyroid scan and uptake?

How Much Does a Thyroid Uptake and Scan Cost? On MDsave, the cost of a Thyroid Uptake and Scan ranges from $341 to $1,199. Those on high deductible health plans or without insurance can save when they buy their procedure upfront through MDsave.