Primary Cardiac Lymphoma in a Cat.

A 5-year-old neutered male domestic shorthaired cat was presented with neurological signs. A primary cardiac lymphoma (PCL) with metastasis to the meninges of the brain was diagnosed histologically. Immunohistochemistry confirmed a B-cell lymphoma. Reports of PCL in cats are scarce. The current case describes a primary cardiac B-cell lymphoma in a cat confirmed by histopathology and immunohistochemistry, and underscores the significance of histopathology for definitive diagnosis.