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Mediastinal parathyroid localization: possible pitfall in technetium-thallium subtraction scintigraphy
1Department of Nuclear Medicine, Universitaire Ziekenhuizen K.U. Leuven, Belgium.
European Journal of Nuclear Medicine
|January 1, 1987
Summary
Technetium-thallium subtraction scintigraphy can detect mediastinal parathyroid adenomas missed by neck surgery. Repeating this imaging, focusing on the superior mediastinum, is recommended for persistent primary hyperparathyroidism.
Area of Science:
- Endocrinology
- Nuclear Medicine
- Surgical Pathology
Background:
- Primary hyperparathyroidism often results from parathyroid adenomas.
- Mediastinal parathyroid adenomas can be challenging to locate surgically.
- Previous neck exploration may fail to identify ectopic adenomas.
Observation:
- Two cases of primary hyperparathyroidism with mediastinal parathyroid adenomas are presented.
- Both patients had undergone prior negative neck explorations.
- Technetium-thallium subtraction scintigraphy successfully identified the mediastinal adenomas in both cases.
Findings:
- Technetium-thallium subtraction scintigraphy is effective for diagnosing mediastinal parathyroid adenomas.
- Negative neck exploration does not exclude ectopic parathyroid tissue.
- Persistent primary hyperparathyroidism warrants further investigation for mediastinal localization.
Implications:
- This imaging technique aids in localizing persistent parathyroid adenomas missed by surgery.
- Repeating scintigraphy with a focus on the superior mediastinum is advised after negative neck exploration.
- Optimizing scintigraphy parameters, such as using a non-zoom, large field of view, can improve diagnostic yield.