Table 3

Results of the cytology and K-ras mutational analysis in reference to the final diagnosis

Final diagnosisCytologyTotal
PositiveNegativeSuspectInsufficient
Malignant stenosis79104307a220
 K-ras positive353914492
 K-ras negative4465163128
Benign stenosis2665174
 K-ras positive26008
 K-ras negative0605166
  • a One specimen could not be amplified and was called K-ras negative.