Unusual Ectopic Parathyroid Adenoma: A Case Report.

An ectopically placed parathyroid in the mediastinum is a rare cause of persistent or recurrent primary hyperparathyroidism. They are rarely in a huge size. We report a case of a 70-year-old man with a history of total parathyroidectomy and thymectomy presented with a lack of appetite, nausea, and generalized bone pain, polydipsia and a calcium level of 14.4 mg/dl. 99mTc-sestamibi scintigraphy with single-photon emission computerized tomography (SPECT) showed a focal zone of radiotracer accumulation in the midline of anterior chest wall (xiphoid level). The mass excised from our patient surgically was 75 grams. This weight and location of the tumor is a very rare finding in parathyroid adenomas.