Table 1: True and false results of FS by tumour size.

T1T2/T3

True negative FS ( )35687/4
True positive FS ( )4632
Total true results FS ( , 83.6%)402123
False negative FS ( )6535/1
False positive FS ( )2
Total false results FS ( , 16.4%)6538
Sensitivity (%)41.4 47.1

FS: frozen section.