Serum Thyroid-Stimulating Hormone
Serum Thyroid-Stimulating Hormone: Excerpt from A Pocket Manual of Differential Diagnosis
Elevated Serum Thyroid-Stimulating Hormone
Primary hypothyroidism
Overt (low free T
4)
Subclinical (normal free T
4)
Assay problems
Assay variability
Heterophile antibodies interfering with the TSH assay
Drugs
Domperidone
Metoclopramide
Pulsatile TSH secretion, nocturnal TSH surge
Recovery from nonthyroidal illness
Thyroid hormone resistance syndromes
TSH-secreting pituitary tumors
Suppressed Serum Thyroid-Stimulating Hormone
Thyrotoxicosis
Overt (low free T
4)
Subclinical (normal free T
4)
T
3 Toxicosis (with normal or low free T
4)
After treatment of thyrotoxicosis, before the axis recovers from suppression
Drugs
Dopamine
Glucocorticoids
Laboratory error
Secondary (pituitary) and tertiary (hypothalamic) hypothyroidism
Severe nonthyroidal illness
References
1. Ross DS: Subclinical Hypothyroidism, pp. 1010–1011. See Bibliography, 4.
2. Ross DS: Subclinical Thyrotoxicosis, pp. 1016–1017. See Bibliography, 4.
Book Source Details
- Book Title: A Pocket Manual of Differential Diagnosis
- Author(s): Stephen N. Adler, Dianne B. Gasbarra
- Year of Publication: 1999
- Copyright Details: A Pocket Manual of Differential Diagnosis, Copyright © 1999 Lippincott Williams & Wilkins.
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Copyright notice for book excerpts: Copyright © 2008 Lippincott Williams & Wilkins. All rights reserved.
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