What type of nodule on a nuclear medicine scan is associated with a malignant thyroid nodule?

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Multiple Choice

What type of nodule on a nuclear medicine scan is associated with a malignant thyroid nodule?

On a thyroid nuclear medicine scan, nodules are judged by how much radiotracer they take up. Cold nodules take up little or none, meaning they are non-functioning relative to the surrounding thyroid tissue. Malignant thyroid nodules tend to be non-functioning because cancerous tissue often loses the ability to trap iodine and concentrate tracer. This contrasts with hot nodules, which are hyperfunctioning and usually represent benign autonomous tissue, and warm nodules, which function like normal thyroid tissue and are also typically benign. So, the pattern most associated with malignancy is a cold, non-functioning nodule. If a cold nodule is seen, it prompts further evaluation with ultrasound and often fine-needle aspiration to assess for cancer.

On a thyroid nuclear medicine scan, nodules are judged by how much radiotracer they take up. Cold nodules take up little or none, meaning they are non-functioning relative to the surrounding thyroid tissue. Malignant thyroid nodules tend to be non-functioning because cancerous tissue often loses the ability to trap iodine and concentrate tracer. This contrasts with hot nodules, which are hyperfunctioning and usually represent benign autonomous tissue, and warm nodules, which function like normal thyroid tissue and are also typically benign.

So, the pattern most associated with malignancy is a cold, non-functioning nodule. If a cold nodule is seen, it prompts further evaluation with ultrasound and often fine-needle aspiration to assess for cancer.

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