Thyroid nodule laboratory findings
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Laboratory Findings
Test | Indication | ||
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Serum thyrotropin | In all thyroid nodules | ||
serum antithyroperoxidase level | If suspected to Hashimoto's thyroiditis | ||
Free T4 | If suspected to hot, thyroid hormone producing nodule | ||
T3 | If suspected to thyrotoxicosis | ||
basal serum calcitonin | In patients with positive family history of medullary thyroid carcinoma
In any patients with family history of MEN In any patients with concomitant hormonal abnormalities |
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plasma metanephrine testing | In patients suspected to MEN to evaluate pheochromocytoma | ||
24-hour urinary collection
for catecholamines and metanephrines |
Levels of thyroid hormones