the observation that in the present series recurrent hyperparathyroidism was associated either with an adenoma ( two cases ) or a carcinoma ( one case ) , appears to stress the possibility of the pathological involvement of one gland even though recurrent hyperparathyroidism should be considered due to the chronic extrinsic stimulation of the parathyroid glands .
C0020502
hyperparathyroidism
C0030518
parathyroid glands