Table 1 Characteristics and perioperative parameters

No. of patients

142

Mean age (years)

55 (20–86)

Sex (male/female)

93 (65.5%)/49 (34.5%)

tumor sites (right/left)

79 (55.6%)/63 (44.4%)

Mean tumor size (range)

3.2 (1.0–10.6)

RENAL nephrometry score mean (range)

5 (4–8)

Low 4–6 (%)

114 (80.2%)

Medium 7–9 (%) 46 (30.2%)

28 (19.8%)

NBCA used (yes/no)

98 (69%)/44 (31%)

Mean operative time, min (range)

120 (40–200)

Mean estimated blood loss, ml (range)

100 (10–500)

Mean change in eGFR (ml/min)

2.3

Blood transfusion

3

conversion to open (n)

0

Positive surgical margin (n)

2

 Renal cell carcinoma

103

 Angiomyolipoma

34

 Oncocytoma

5