Ultrasound of Parathyroid Adenoma

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Radiology Lectures | Radquarters

Daniel J. Kowal, MD

75 episodes

2 weeks ago

High-yield, educational radiology lectures utilizing a multimodality imaging approach including MRI, CT, ultrasound, radiography, and nuclear medicine. Lectures are presented in both didactic and quiz formats. These video podcasts are designed for radiology residents, fellows, and radiologists, as well as any student or practitioner interested in optimizing patient care through radiology. Visit www.radiologistHQ.com for more info and reference material.

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Ultrasound of Parathyroid Adenoma

Radiology Lectures | Radquarters

6 minutes 37 seconds

1 year ago

Ultrasound of Parathyroid Adenoma

In this radiology lecture, we review the ultrasound appearance of parathyroid adenoma!
Key teaching points include:

* Benign tumor of the parathyroid glands
* Most common cause of primary hyperparathyroidism: Elevated serum calcium and parathyroid hormone (PTH) levels
* Ultrasound: Solid, homogeneous and very hypoechoic. Oval or bean-shaped, long axis oriented craniocaudal. Hypervascular. Majority posterior and inferior to thyroid. Hyperechoic line often separates adenoma from adjacent thyroid. Atypical features: Cystic degeneration, calcification.
* Tc-99m sestamibi: Radiotracer uptake persisting on delayed 2-hour images. Taken up by both thyroid and parathyroid tissue, but washes out more rapidly from thyroid. Greater than 90% predictive value for preoperative localization of parathyroid adenoma. SPECT aids with anatomic localization
* Ectopic locations in up to 5%: Lower neck, mediastinum, retrotracheal/retroesophageal, carotid sheath and intrathyroidal (typically more homogeneous than thyroid nodules and have a linear interface with gland)
* Larger adenomas can be multilobulated
* “Polar vessel” sign: Enlarged feeding artery or draining vein terminating at parathyroid adenoma

To learn more about the Samsung RS85 Prestige ultrasound system, please visit: https://www.bostonimaging.com/rs85-prestige-ultrasound-system-4
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