HER2 expression as detected by IHC and FISH in discordant cases where HER2 status was positive in the LNM but negative in the PGC. (A) FISH-positive LNM sample. (B) IHC-positive LNM sample. (C) FISH-negative PGC sample. (D) IHC-negative PGC sample.
Kochi et al. Diagnostic Pathology 2013 8:191 doi:10.1186/1746-1596-8-191