What is Endocrinology - What does a heated nodule mean, exactly?
A heated nodule, however, may be cancerous. Because they are surrounded by healthy thyroid tissue, some hyperfunctional or isofunctional nodules are actually cold nodules that appear to concentrate tracer. Other autonomous nodules are unable to produce enough thyroid hormone to reduce TSH and reduce the uptake of tracers by the surrounding normal thyroid tissue. The autonomous nature of such a nodule can be determined by thyroid scanning following the administration of a TSH-suppressive dose of thyroid hormone to the patient. All other nodules require FNA to rule out thyroid cancer, while autonomous nodules can be monitored just by observation.
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