This was an aspirate from a dog with 2 similar masses one being on the base of the tail.
On aspiration, pale creamy material was obtained.
Cytologicaly numerous neutrophils are seen with lesser macrophages and no organisms.
Aggregates of keratin (clear, non-staining and refractile) are seen in moderate numbers and closely associated with the inflammation (rather then rolled up superfical contaminating squames which often stain blue).
When cysts rupture they incite a foreign body reaction like they would with furunculosis.
First published: Thu, Oct 21 2010
Publishing Editor: Arlo Guthrie
Clinical Editor: Alasdair Hotston Moore MA VetMB CertSAC CertVR CertSAS FRCVS
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