Thyroid Disorders · Pathology

A 'cold' nodule on a radioactive iodine uptake scan is most concerning for:

  1. Graves disease
  2. Toxic adenoma
  3. Thyroid malignancy
  4. Subacute thyroiditis
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Correct answer: Thyroid malignancy

Cold nodules do not take up radioactive iodine, indicating they are non-functional. While most cold nodules are benign, almost all thyroid carcinomas present as cold nodules, making further investigation like FNA necessary.

Difficulty: Medium Question 17 of 20

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