Table 1.

Characteristics of the sample under examination

Total number of patients	136
Male	34
Female	102
F/M	3:1
Average diagnosis age	59
Asymptomatic patients	53 (39%)
Symptomatic patients	83 (61%)
Nephrolithiasis	61 (73.5%)
Other symtomatology	23 (27.7%)
PHPT laboratory picture	-
Classic	131 (96.3%)
Normocalcemic	3 (2.2%)
Normohormonal	2 (1.5%)
Serum calcium levels hypercalcaemia	133 (97.8%)
Only ionized	2 (2%)
Mild (10.3–11.9 mg/dl)	105 (79%)
Moderate (12–13.9 mg/dl)	19 (14%)
Severe (≥ 14 mg/dl)	7 (5%)
Normocalcaemia	3 (2.2%)
Serum PTH levels increased	134 (98.5%)
Within twice the upper limit of normality (≤ 140 pg/ml)	57 (42.5%)
Over twice the upper limit of normalilty (> 140 pg/ml)	77 (57.5%)
Inappropriately normal	2 (1.5%)