Sonographically Guided Fine Needle Aspiration with Rapid Parathyroid Hormone Assay

Background Persistent or recurrent primary hyperparathyroidism (1° HPTH) is ideally treated with limited dissection, based on accurate localization, to minimize operative risks. To accurately localize parathyroid tissue, we employed ultrasound-guided fine needle aspiration (US FNA) with an on-site rapid parathyroid hormone (PTH) assay to confirm localization.