Table 3
Cases with discordant results
Final diagnosis
FISH result
PCR result
Atypical Ewing sarcoma
Negative for
EWSR1
rearrangement
EWSR1-ERG
fusion
Ewing sarcoma
Negative for
EWSR1
rearrangement
EWSR1-ERG
fusion
FISH, fluorescence in situ hybridisation.