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Myeloid neoplasms constitute a very low percentage of the cases examined at university teaching hospitals. The university hospital prevalence rate taken from a study of the Veterinary Medical Data Base at Purdue University (1987 - 1997) indicated 0.02% in dogs and 0.05% in cats. The prevalence of myeloid neoplasms of all hemolymphatic neoplasms of animals is approximately 5% in dogs and 10 - 15% in cats. A wide spectrum of these nonlymphoid, nondendritic, and non-mast cell neoplasms have been identified in small domestic animals [4]. However reports have been published in other domestic and non-domestic mammals, birds, and reptiles. It is suspected that the poor prognosis along with frequent euthanasia in these cases limits their awareness to pathologists and oncologists.
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