[Histonet] tissue falling out of paraffin block

[Price, Tiffany]

Can anyone tell me what would make liver tissue fall out of a paraffin
block after routine processing? We cut a routine H&E slide, and later,
had to cut IHC stains that were ordered. The tissue was fine for the
H&E, but the whole tissue fell out of the block when we tried to re-cut
it, even after re-embedding. 
 
Thanks for any help
Tiffany
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