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The Parathyroid Glands00:59

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The two pairs of parathyroid glands embedded within the posterior surface of the thyroid gland are restricted by a dense capsule around them. These glands comprise two distinct cell populations—parathyroid oxyphil and parathyroid principal cells- pivotal in calcium homeostasis.
Oxyphil cells, whose functions remain elusive, emerge during late puberty, adding a layer of complexity to the parathyroid gland's intricacies. In contrast, principal parathyroid cells undertake a vital role by...
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18F-Choline PET/CT Localization in a 20-Year Experience of Re-Operative Parathyroidectomy.

Anh N Vu1, Katherine A Black1, Osama Shattarah1

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18F-fluorocholine positron emission tomography/computed tomography (PET/CT) significantly improves localization accuracy for reoperative parathyroidectomy. This advanced imaging enables focused surgery, leading to high cure rates and reduced complications in patients with persistent or recurrent primary hyperparathyroidism.

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Area of Science:

  • Endocrinology
  • Nuclear Medicine
  • Surgical Oncology

Background:

  • Reoperative parathyroidectomy is crucial for persistent or recurrent primary hyperparathyroidism, affecting up to 10% of patients.
  • Accurate preoperative localization is vital for surgical success and complication avoidance in these challenging cases.
  • Conventional imaging modalities like ultrasonography and sestamibi scintigraphy frequently provide inconclusive or false-negative results.

Purpose of the Study:

  • To assess the diagnostic accuracy and clinical utility of 18F-fluorocholine PET/CT.
  • To compare 18F-fluorocholine PET/CT with traditional imaging methods (neck ultrasonography, 99mTc-sestamibi scintigraphy).
  • To evaluate these modalities in patients undergoing reoperative parathyroidectomy.

Main Methods:

  • Retrospective cohort study analyzing 124 reoperative parathyroidectomy operations over 20 years (2005-2025).
  • Inclusion of 114 adult patients with persistent/recurrent primary hyperparathyroidism, including those with lithium-associated hyperparathyroidism or MEN1.
  • Analysis of localization imaging detection rates, surgical approach, intraoperative PTH monitoring, biochemical cure, and complications.

Main Results:

  • 18F-fluorocholine PET/CT achieved a 95.2% detection rate, significantly outperforming other modalities.
  • In 90.5% of cases with inconclusive conventional imaging, 18F-fluorocholine PET/CT provided accurate localization.
  • Focused surgical approaches were feasible in 87.1%, correlating with a 95.8% biochemical cure rate and low complication rates (0.8% vocal cord palsy, 2.4% hypoparathyroidism).

Conclusions:

  • 18F-fluorocholine PET/CT demonstrates superior localization accuracy and a favorable radiation profile for reoperative parathyroidectomy.
  • It is recommended as a first-line imaging modality in this patient population.
  • Its use facilitates focused surgery, high cure rates, and reduced patient morbidity.