A 58-year-old woman has serum calcium 2.78 mmol/L on repeat testing, low phosphate and inappropriately normal-high parathyroid hormone. She has osteop...

Question

A 58-year-old woman has serum calcium 2.78 mmol/L on repeat testing, low phosphate and inappropriately normal-high parathyroid hormone. She has osteoporosis and nephrolithiasis. What is the most likely diagnosis?

Accepted Answer

Primary hyperparathyroidism

Answer

Secondary hyperparathyroidism from vitamin D deficiency

Answer

Tertiary hyperparathyroidism

Answer

Malignancy-associated hypercalcaemia with suppressed PTH

Answer

Familial hypocalciuric hypercalcaemia

Primary hyperparathyroidism — MCCQE Part 1 MCQ

A 58-year-old woman has serum calcium 2.78 mmol/L on repeat testing, low phosphate and inappropriately normal-high parathyroid hormone. She has osteoporosis and nephrolithiasis. What is the most likely diagnosis?