Nuclear medicine: contraindication: practice question

A Radiology question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

Try it

Radiology · Nuclear medicine: contraindication

Sample item

I-131 therapy for hyperthyroidism is absolutely contraindicated in which situation?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

A. Pregnancy

Radioiodine crosses the placenta and the fetal thyroid takes it up after 10 to 12 weeks, risking ablation. Pregnancy must be excluded before treatment, and conception is deferred for some months. Elderly patients with toxic nodular goitre and relapse after surgery are good candidates.

Option by option

  • A. Pregnancy (correct)

    Correct. Pregnancy and lactation are contraindications.

  • B. Recurrent hyperthyroidism after surgery

    Recurrence after surgery is an indication.

  • C. Toxic multinodular goitre in an elderly patient

    Toxic multinodular goitre is an indication.

  • D. Relapse after antithyroid drugs

    Relapse after drugs is a standard indication.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

More Radiology questions

Questions about this Radiology question

What is the answer to this Radiology question?

The best answer is A, Pregnancy. Radioiodine crosses the placenta and the fetal thyroid takes it up after 10 to 12 weeks, risking ablation.

Why is "Recurrent hyperthyroidism after surgery" not the answer?

Recurrence after surgery is an indication.

Why is "Toxic multinodular goitre in an elderly patient" not the answer?

Toxic multinodular goitre is an indication.

Why is "Relapse after antithyroid drugs" not the answer?

Relapse after drugs is a standard indication.

What concept does this question test?

It tests Nuclear medicine: contraindication in Radiology. Pregnancy must be excluded before treatment, and conception is deferred for some months. Elderly patients with toxic nodular goitre and relapse after surgery are good candidates.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Nuclear medicine: contraindication?

Learn signs with the image, and the disease they point to. Then use the flashcards and the other Radiology questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.