Adolescent Adult Age Factors Aged Aged, 80 and over Antineoplastic Agents--therapeutic use Female Humans Hypercalcemia--drug therapy Hyperparathyroidism--physiopathology Male Middle Aged Neoplasm Metastasis Palliative Care Parathyroid Neoplasms--drug therapy Plicamycin--therapeutic use Recurrence Reoperation Sex Factors