Ming-Che Tsai2026-10-162026-10-162008-02-01Pure ID: 14917837Pure UUID: 2d472494-3bd1-49e4-bf68-87946d4355f110.1016/j.jemermed.2007.05.047https://www.scopus.com/pages/publications/39049090032https://scholars.csmu.edu.tw/handle/123456789/28299Hypercalcemia is an uncommon cause of abdominal pain and may be overlooked in the Emergency Department. In this case report, we describe the case of a 48-year-old woman with a prior history of urolithiasis who presented to the Emergency Department with diffuse abdominal pain. She had taken Trichlormethiazide 1 mg daily for her urolithiasis. She was diagnosed with thiazide-related hypercalcemia; hyperparathyroidism and thyroid papillary carcinoma were unveiled during her hospitalization. A thorough history and complete physical examination, paired with appropriate but judicious diagnostic testing, are essential to detecting these unusual causes of abdominal pain.3enjournal article