>Can anyone speculate on possible causes for the fluctuating PCV values
>we're seeing here?  Is this p.  vera with another under- or overlying
>problem?  Can anyone suggest further diagnostic procedures that might
>help us nail down the cause?  The chances of us doing a bone marrow
>biopsy are nil; an exploratory, very unlikely.  An ultrasound to check
>heart/lung appearance is possible.
 
Bone marrow biopsy is obviously the best test for determining the presence
of P. vera, in my opinion.  However, you might consider running an
erythropoietin level to determine if something else in the body is
telling it to overproduce red cells.
 
Dr. Ruth
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Save lives - spay or neuter your pet.
[Posted in FML issue 3664]