Primary hyperparathyroidism caused by mediastinal ectopic parathyroid adenoma.

A 37-year-old Chinese woman was admitted to the First Affiliated Hospital, College of Medicine, Zhejiang University, China in July 2009 with pain in the upper back and hip for 9 months. She denied any chronic medication or illness. Her serum calcium level was 2.73 mmol/L (reference range [RR], 2.082.60 mmol/L), phosphorus 0.68 mmol/L (RR, 0.811.62 mmol/L), alkaline phosphatase 366 IU/L (RR, 30-115 IU/L), and intact parathyroid hormone (iPTH) 1154 pg/mL (RR, 12-65 pg/mL). T-score and Z-score for femoral bone mineral density were -2.7 and -2.8, respectively. Cervical computed tomography (CT) scan and thyroid, parathyroid, and abdominal Hong Kong Med J 2017;23:411–3 DOI: 10.12809/hkmj164957