A case of multi-organ failure due to hyperparathyroidism-related hypercalcaemia

Albeit still rare, hypercalcaemia has been linked to pulmonary oedema in solid organ malignancy and chronic renal failure. However to date, there is only one case report linking pulmonary oedema to hypercalcaemia secondary to primary hyperparathyroidism. Case presentation: A 60-year-old male presented to the emergency department with a history of confusion and collapse. Investigations revealed initial serum calcium of over 5 mmol/L. He subsequently developed widespread bilateral chest infiltrates with increasing oxygen requirements and an acute kidney injury. On day 9, continuous haemodiafiltration was commenced; however, hypercalcaemia proved resistant to maximal therapy. His initial parathyroid hormone (PTH) level measured 371 ng/L, and an ultrasound of his neck revealed a 2 x 2.5 cm parathyroid mass in the inferior neck. An acute parathyroidectomy was performed following which his chest infiltrates resolved and serum calcium levels returned to within normal range. Conclusions: This case highlights primary hyperparathyroidism and the resulting hypercalcaemia as a sole cause for multi-organ failure in an otherwise well patient.