from january 1984 to august 1986 , a total of 16 patients with the diagnosis of primary hyperparathyroidism ( 14 ) or secondary hyperparathyroidism ( 2 ) received preoperative t1-tc image studies to localize the hyperfunctioning parathyroid glands .
C0020503
secondary hyperparathyroidism
C0030518
parathyroid glands