Table 2: Tumor characteristics.

FeaturesNo. (%) ( )

Histopathological type
 Squamous cell carcinoma14 (32.5)
 Adenocarcinoma16 (37.2)
 Large cell carcinoma7 (16.3)
 Other 6 (14.0)
Grade of differentiation
 Well 8 (18.6)
 Moderate15 (34.9)
 Poor20 (46.5)
Degree of cell pleomorphism
 Low17 (39.5)
 Moderate16 (37.2)
 High10 (23.3)
Necrosis index
 <50%31 (72.1)
 ≥50%12 (27.9)

No.: number of cases; %: percentages.