Spontaneous Tumors of the Nervous System in Albino Rats

Abstract
A retrospective review of necropsies of 7803 albino rats revealed 34 tumors originating in the brain or meninges for an overall incidence of 0.44%. In addition, 4 tumors of ganglion cell origin were found. The most frequent brain tumor was the astrocytoma. Other tumor types included oligodendroglioma, ependymoma, meningioma, ganglioneuroma, and optic nerve glioma. The tumors had a predeliction for male rats and occurred at an average age of 17–18 months.

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