Recent studies report the incidence of intrathyroidal parathyroid adenomas to be between 1.3% and 2.4% in patients with primary hyperparathyroidism.1,2 The standard treatment for hyperparathyroidism caused by an intrathyroidal parathyroid adenoma has been surgery that often requires a lobectomy.1 Treating primary hyperparathyroidism with radiofrequency ablation (RFA) has increasingly become an option as it has shown to be both safe and effective.3–7 We present a patient with primary hyperparathyroidism caused by a right-sided intrathyroidal parathyroid adenoma localized with fine needle aspiration (FNA) biopsy and parathyroid hormone (PTH) washout who is treated with RFA.
