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The reason why shellfish allergy is asked is because of the link between shellfish allergy and iodine allergy (shellfish are rich in iodine). That does not mean that if your allergic to shellfish then you are allergic to iodine - you may be allergic to another component that is in the shellfish.
Iodine is used in the thyroid scan as a dye and is injected into your veins. If you are allergic then the reaction would be quite quick and potentially serious. Asking about a shellfish allergy is to try to risk stratify those that may be more susceptible for a reaction and "prepare" the technician / radiologist for the worse case scenario.
The main allergic reaction we would be worried about would be true anaphylaxis (if you've not heard of this then you probably not had it). Rashes and facial swelling would indicate a allergic reaction. Sickness, diarrhea and feeling "off" would suggest an intolerance rather than a true allergic reaction.
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El Tango
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∙ 15y ago
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What can you eat after taking the thyroid scan pill?
Talk with your physician regarding any concerns or dietary restrictions before and after taking the radioactive isotope needed for a thyroid scan uptake. Typically, an endocrinologist will advise staying away from shellfish before the thyroid uptake scan. They might also have other suggestions so be sure to find out what they recommend.
When would someone need a thyroid ultrasound?
Most thyroid ultrasounds are performed to evaluate a small lump (nodule) in the thyroid found during a physical examination or found by a radionuclide study (thyroid scan).
Can you perform ct scan of thyroid gland?
If there is a need to scan the thyroid gland, most of the time it can be done using an ultrasound scan. If further testing is needed, sometimes a doctor will order what's called a thyroid scan. A thyroid scan is a picture of the thyroid gland. This is taken after a small dose of a radioactive isotope, that is normally absorbed by the thyroid cells, has been injected or swallowed. This helps a physician determine if a growth on the thyroid is an active part of the thyroid tissue or not.
What other names are there for a thyroid nuclear medicine scan?
may also be referred to as a thyroid scintiscan. The name of the radioactive substance used may be incorporated and the study called a technetium thyroid scan or an iodine thyroid scan.
Why use the Thyroid Uptake and scan on the thyroid?
Because the results of the uptake will determine whether you will need surgery to remove your thyroid glands.
What would mild heterogeneity of thyroid mean on a followup CT Scan report?
the ct scan said thyroid is hetergenous in apperance their is mild enlargement of the right lobe of the thyroid
What does hyperdensity in a cat scan of thyroid mean?
Hyperdensity in a cat scan of the thyroid indicates calcifications, hemorrhage, or colloid. The thyroid gland is one of the largest endocrine glands and consists of two connected lobes.
Should thyroid uptake scan be done if you have had thyroid removed?
A thyroid uptake scan wouldn't normally be needed unless it is suspected that thyroid tissue was missed during surgery (sometimes thyroid tissue can be found in other areas of the body), or the reason for the surgery was cancer and the removal of all the tissue is vital.
Is it necessary to fast before a thyroid test?
Unless your doctor asks you to fast for your thyroid test(s), usually you do not need to for a blood test. Some thyroid tests, such as a thyroid uptake scan, requires you to stay away from eating certain fish (usually shellfish) prior to and shortly after the test is conducted. Talk with your doctor if you have any questions regarding how they want you to prepare for your thyroid tests.
What doe malignancy cannt be ruled out on a thyroid scan mean?
If malignancy cannot be ruled out from the results of a thyroid scan, this means that a thyroid nodule may or may not be an active part of the thyroid tissue. Therefore, more testing might be needed to determine if there is a malignant growth. Another test that might help make a clearer diagnosis is a fine needle biopsy. If after a needle biopsy and thyroid scan, it is still unclear if a thyroid growth is malignant, surgery might be an option. Talk with your doctor regarding the results of your test and to find out what they suggest.
How long should you wait to conceive after exposure to thyroid scan?
2 months
After having a thyroid scan with uptake places of inactivity are detected what does this mean?
Any thyroid issues can be found out through a blood test too.
