In exams primary hyperparathyroidism is stereotypically seen in elderly females with an unquenchable thirst and an inappropriately normal or raised parathyroid hormone level. It is most commonly due to a solitary adenoma
Causes
80%: solitary adenoma
15%: hyperplasia
4%: multiple adenoma
1%: carcinoma
Features
‘bones, stones, abdominal groans and psychic moans’
polydipsia, polyuria
peptic ulceration/constipation/pancreatitis
bone pain/fracture
renal stones
depression
hypertension
Associations
hypertension
multiple endocrine neoplasia: MEN I and II
Investigations
raised calcium, low phosphate
PTH may be raised or normal
technetium-MIBI subtraction scan