To David Ellis:
 
>"It" is a perfectly circular disk marking about 1 centimeter across on the
>belly about 1 inch to the left of center and about half way between the
>hind legs and front legs...
 
I've seen this mark in several ferrets.  In most cases, the mark appears on
ferrets with adrenal disease.  As I have never seen a biopsy of it, I'm not
quite sure what it is.  But it is very characteristic, just like you
described it.  I would suggest having your ferret looked at by a
ferret-knowledgable vet for other signs of adrenal disease.
 
Bruce Williams, DVM, DACVP              Chief Pathologist, AccuPath
Dept. of Veterinary Pathology               [log in to unmask]
Armed Forces Institute of Pathology
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[Posted in FML issue 1520]