A 56-year-old woman was referred for assessment of asymptomatic hypercalcaemia.
Investigations:
serum corrected calcium2.73 mmol/L (2.20C2.60)
plasma parathyroid hormone8.9 pmol/L (0.9C5.4)
urinary calcium:creatinine clearance ratio0.002
An X-ray of abdomen was normal and imaging of her neck showed no evidence of a parathyroid adenoma.
What is the pattern of inheritance of this condition?
A . autosomal dominant
B . autosomal recessive
C . mitochondrial
D . X-linked dominant
E . X-linked recessive
Answer: A