Question

A 63-year-old man presents with constipation, polyuria and lethargy. Serum calcium is 3.1 mmol/L (2.15-2.60), phosphate is low and PTH is elevated. Which is the most likely underlying diagnosis?

Accepted Answer

Primary hyperparathyroidism

Answer

Malignancy-associated hypercalcaemia with PTH-related peptide

Answer

Vitamin D intoxication

Answer

Thiazide diuretic-induced hypercalcaemia

Answer

Sarcoidosis

Practice question

A 63-year-old man presents with constipation, polyuria and lethargy. Serum calcium is 3.1 mmol/L (2.15-2.60), phosphate is low and PTH is elevated. Which is the most likely underlying diagnosis?