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Radioactive Iodine scan with previous history of allergy to contrast

Resolved Question:

I am 42 year old female. Just diagnosed with Hyperthyroid from TSH test. I am being told to go for
Radioactive iodine uptake test and Thyroid Scan. The doctor told me usually they give Radioactive iodine as treatment as well.

My mother told me when I was 5 years old I had contrast dye for Kidney tracing, and ended up with hives.

So basically I am scared that I will be allergic to this stuff. How can I be sure?



Category: Radiologist

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Category: Radiologist
Dr. Rohit Malik is online now

Expert:  Dr. Rohit Malik replied 4 Days.

Hello,

Thank you for your consult at DoctorSpring.com.

The chances are that you might be allergic to the radioactive iodine judging from your reactions as a child. Relate this information to your doctor as he can perform a sensitivity test to confirm the allergy before going through with the test. If you are allergic, you should not do the uptake test or the thyroid scan. Both require radioactive iodine, but as an alternative radioactive technitium is also an option. I would recommend you perform sensitivity testing for radioactive technitium as well before use. This will be a sure way for you to know if you are sensitive or not.

As far as radioactive treatment for hyperthyroidism, there are other alternatives to radioactive iodine treatment if you are allergic. Other options include antithyroid therapy with methimazole or propothiouracil and surgical removal or thyroidectomy. Discuss with your local physician or endocrinologist the suggestions I have mentioned and consider if they are a good fit for you.

Hope this helps, Please ask if you have any follow up questions. Take care.

Regards
Dr Malik


Dr. Rohit Malik
Category: Radiologist
Experience: 
Residency, Fellowship: DNB, DMRD, DMRE, Diagnostic Radiology Residency Program, Seth G.S. Medical College & KEM Hospital, 1997 – 2001
 
Medical School: MBBS, Bachelor of Medicine, Bachelor of Surgery (MBBS), Lokmanya TIlak Muncipal Medical College, 1991 – 1997
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