Primary Central Nervous System T-Cell Lymphoma Mimicking Meningoencephalomyelitis In A Cat

A cat was presented with right head tilt and circling. The lack of expression of virus antigens did not support the postmortem diagnosis of encephalomyelitis pointing to a diffuse primary central nervous system T-cell lymphoma on the basis of CD3 and CD45R co-expression with absence of CD79 alpha staining.