Case Presentation
A 78 years-old woman was referred due to worsening hypercalcemia during the past 2 years. She complained of memory loss and was found with osteopenia (hip T-score: -2.3 on DXA scan). Her past medical and family history was unremarkable. Calcium and PTH serum levels were 11.6mg/dL,156 pg/ml 2 years prior and 13.6mg/dL, 662pg/ml on admission (normal values: 8.4-10.1, and 15-65 respectively). Albumin, Vit. D and kidney function were normal. Neck ultrasound/ CT/MRI as well as sestaMIBI did not found any pathologic findings (Fig 1A&B).