Any idea why?

[Majde]

I doning in-situ hybridization in section detection MYC mRNA. I am 
geting signal in the cytoplasm as well as spot in the nucleus of some 
cells. Is any body know why I am getting signal in nucleus if we know 
that the mature mRNA in the cytoplasm. Beside that the probes I am 
used is olignucleotide and design specifically for mRNA only. Any help 
will be appreciated.

Majde