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Transient Hyperthyroidism Induced by Thyroid Ultrasound.

Rajini K Yatavelli¹, Steven N Levine¹

¹1 Section of Endocrinology and Metabolism, Department of Internal Medicine, Louisiana State University Health Sciences Center in Shreveport, Shreveport, Louisiana, USA.

The Annals of Otology, Rhinology, and Laryngology

|June 19, 2018

Summary

Thyroid ultrasounds can rarely cause transient hyperthyroidism in patients with large goiters. This condition resolved spontaneously without medication, suggesting hormone release from compressed nodules.

Keywords:

hyperthyroidism thyroiditis thyrotoxicosis ultrasonography ultrasonography/adverse effects

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Area of Science:

Endocrinology
Diagnostic Imaging

Background:

Transient hyperthyroidism is known after thyroid trauma or surgery.
Previous reports link it to parathyroidectomy, neck trauma, strangulation, and palpation.
No cases have been linked to diagnostic thyroid ultrasound.

Observation:

A 58-year-old woman with a large nontoxic multinodular goiter underwent a thyroid ultrasound.
She developed transient hyperthyroidism post-procedure.
No anti-thyroid medications were administered.

Findings:

Thyroid hormone levels (free T3, free T4) normalized within two weeks.
Thyroid Stimulating Hormone (TSH) and other thyroid tests returned to normal range by 11 weeks.
The patient's hyperthyroidism resolved spontaneously.

Implications:

This is the first reported case of hyperthyroidism induced by thyroid ultrasonography.
The mechanism may involve pressure from the ultrasound probe compressing nodules and releasing stored thyroid hormone.
Highlights a rare potential complication of thyroid ultrasound in specific patient populations.