Table 2.

MS sequencing results from the nine tumor samples that showed a mismatch between immunohistochemical staining and direct DNA sequencing

(A) EGFR mutant status from IHC, direct DNA sequencing, and MS sequencing
No.IHCDirect seqMS
Exon 19 deletions
    CL736WtDel (E746_A750)Del
L858R mutations
(B) Correlation of MS sequencing to detect EGFR mutation with IHC and direct DNA sequencing
Correlative no.
Exon 19 del
IHC/MS seq7/96/6 (3 MS seq failed)87
Direct seq/MS seq4/92/6 (3 MS seq failed)40
  • Abbreviation: seq, sequencing.