the serum concentrations of calcium , albumin and parathyroid hormone ( pth ) and the plasma levels of ionized calcium were determined in 124 healthy subjects , 89 patients with primary hyperparathyroidism ( hpt ) , 23 of whom had the syndrome of multiple endocrine neoplasia type 1 ( men-1 ) and 43 patients who had hypercalcaemia of other causes than hpt ( non-hpt ) , in most cases due to widespread malignancies .
C0221002
primary hyperparathyroidism
C0020502
hpt