in 2 cases of recurrent secondary hyperparathyroidism and 4 cases of persisting secondary hyperparathyroidism observed in patients treated by chronic haemodialysis , 8 hyperplastic parathyroid masses and 1 parathyroid adenoma , all located in the lower part of the neck , were removed after percutaneous ultrasonographic detection .
C0020503
secondary hyperparathyroidism
C0030518
parathyroid