• Carlo Jan P Garingarao, Elizabeth Paz-Pacheco, and Cecilia A Jimeno.
• Department of Medicine; Section of Endocrinology, Diabetes and Metabolism, University of the Philippines, Philippine General Hospital, Manila, NCR, Philippines.
• BMJ Case Rep. 2014 Mar 14; 2014.

AbstractPrimary hyperparathyroidism (PHPT) may lead to skeletal deformities, fractures and renal failure in symptomatic patients if untreated. We present a case of a 30-year-old woman presented with muscle weakness, weight loss, hypercalcaemia and a pathological fracture, eventually with rapidly progressive musculoskeletal disease. Subsequent biochemical, radiographic and scintigraphy findings were consistent with PHPT from an ectopic mediastinal adenoma, and concomitant vitamin D deficiency. The severe hypercalcaemia was adequately temporised with hydration, forced diuresis and intravenous bisphosphonates. Removal of the adenoma by video-assisted thoracoscopic surgery was contemplated; however, consent was withdrawn precluding histological confirmation. A review of literature shows the changing profiles of patients with PHPT, the uncommon occurrence of parathyroid adenomas in ectopic locations and possible association between severity of PHPT and vitamin D status.

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