[Histonet] IHC controls for FNA's

[Jeffrey Silverman]

It would depend on what type of tissue/ cells you are staining and what antibodies.  Why not obtain some of the fresh tissue from your most commonly performed (and IHC stained) type of cases, or from tissues that you know would be positive for the antibodies in question and do an FNA on it yourself. Aspirate some cells and make smears and fix them as you do your FNA's.
It may be a problem to do this contemporaneously but maybe storing some smears in 95% alcohol would be appropriate. 

Jeff Silverman