Intrathyroidal Parathyroid Cyst in a Middle-aged Woman

Parathyroid cyst is a rare entity that can closely mimic thyroid and brachial cleft cysts, particularly when located within the thyroid gland. Most commonly, the cysts are non-functional but can produce compressive symptoms. The cyst contains watery content with elevated PTH levels, specifying parathyroid origin¹. Parathyroid cysts should be considered in the differential in patients with a neck mass. This study describes a rare case of a middle-aged woman with a history of a symptomatic intrathyroidal parathyroid cyst discovered intraoperatively.