Ventricular ependymoma in a German Shepherd dog

Area of Science:

• Veterinary Neurology
• Neuro-oncology
• Canine Pathology

Background:

• Ependymomas are rare glial tumors arising from ependymal cells lining the ventricles or central canal.
• Canine brain tumors, including ependymomas, can cause significant neurological deficits.
• Accurate diagnosis relies on a combination of advanced imaging and histopathological analysis.

Observation:

• A 9-year-old German Shepherd presented with behavioral changes, oculocephalic responses, and generalized ataxia.
• Magnetic resonance imaging (MRI) revealed an intra-axial ependymoma within the right interventricular foramen.
• Associated hydrocephalus was identified via MRI, indicating increased intracranial pressure.

Findings:

• The ependymoma measured 9 x 6 x 5mm.
• Microscopic examination showed characteristic ependymal pseudorosettes.
• Immunohistochemistry confirmed neoplastic cells expressing vimentin and glial fibrillary acidic protein (GFAP).

Implications:

• This case highlights the importance of advanced diagnostics like MRI in identifying canine brain tumors.
• Understanding the histopathological features and immunohistochemical profile aids in accurate diagnosis and classification of canine ependymomas.
• Further research into canine ependymomas can improve diagnostic strategies and therapeutic approaches for affected animals.