Table 1 Patient characteristics

Sex

 Male/Female

527/139 (79.1/20.9%)

Age (years)

 Median/Range

43/10-78

Histology

 WHO I/II/III

8/55/603 (1.2/8.3/90.5%)

T classification

 T1/T2/T3/T4

80/243/250/93 (12.0/36.5/37.5/14.0%)

N classification

 N0/N1/N2/N3

236/245/172/13 (35.4/36.8/25.8/2.0%)

Clinical stage

 I/II/III/IV

57/189/315/105 (8.5/28.4/47.3/15.8%)