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Ectopic thyroid tissue on thallium/technetium parathyroid scan.

A Asp, J Hasbargen, P Blue

Archives of Internal Medicine

|March 1, 1987

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The thallium-201/technetium-99m pertechnetate scan can help locate abnormal parathyroid tissue. However, this study may produce false-positive results, mistaking ectopic thyroid tissue for parathyroid adenomas.

Area of Science:

Nuclear Medicine
Radiology
Endocrinology

Background:

The thallium-201/technetium-99m pertechnetate radionuclide study is a common imaging technique.
This method is frequently employed for localizing abnormal or ectopic parathyroid tissue.

Observation:

A case is presented where ectopic retrosternal thyroid tissue was observed.
This tissue was misinterpreted as a parathyroid adenoma on the radionuclide scan.

Findings:

The thallium-201/technetium-99m pertechnetate scan can yield false-positive results.
Ectopic thyroid tissue in the mediastinum may mimic parathyroid adenomas.

Implications:

Clinicians utilizing this radionuclide study must be aware of potential false-positive findings.

Related Experiment Videos

Careful interpretation is necessary to avoid misdiagnosis of mediastinal abnormalities.