carcinomas of the head and neck may elaborate parathormone or parathormone-like humors that in the absence of bone metastases , renal disease , parathytoid tumors , or secondary hyperparathyroidism may produce hypercalcemia , which if unrecognized , complicates and prevents the appropriate management of the patient .
C0027530
neck
C0020503
secondary hyperparathyroidism