Table 1.

Characteristics of patients with parathyroid carcinoma. Numbers are presented as median (range).

Number of patients	32
Age at diagnosis (years)	64 (35–83)
Preoperative serum ionized calcium (mmol/L)	1.76 (1.38–2.58)
Preoperative PTH (ng/L)	989 (68–4000)
Ki-67%	5 (0–40)
Patients with metastatic disease or local recurrence	7
Disease-related death	5