Dana,
one can easily see intact red blood cells in capillaries in virtually any H&E on tissue that has been formalin fixed. given this fact, how do you explain your observations with formalin and rbc?
Vinnie

>>> <DDittus787@aol.com> 05/10/01 06:24PM >>>
Formalin fixed RBCS will lyse, due to the water content in Formalin, I have 
done this with peripheral smears that have malignant cells in them, I fix in 
formalin, it rids my slide of rbcs(endogenous peroxidase) and adheres the 
malignant cells to the slide.

                                                Dana