Intracerebral neurilemmoma

Area of Science:

• Neurology
• Neurosurgery
• Oncology

Background:

• Intracerebral neurilemmomas are rare nerve sheath neoplasms originating within the brain parenchyma.
• While often associated with neurofibromatosis (von Recklinghausen's disease), sporadic occurrences are documented.
• Understanding the distinct clinical and pathological features of these tumors is crucial for diagnosis and management.

Observation:

• Two distinct cases of intracerebral neurilemmoma were identified.
• Case 1: A clinically asymptomatic patient with an isolated intracerebral neurilemmoma.
• Case 2: A unique presentation of a combined oligodendroglioma and neurilemmoma within the same intracranial mass, notably without neurofibromatosis stigmata.

Findings:

• Electron microscopy confirmed the nerve sheath origin of both neoplasms.
• Intracerebral neurilemmomas present differently from cranial nerve tumors, typically affecting younger males (first two decades).
• Common symptoms include seizures and paresis, though these are non-specific indicators.

Implications:

• These cases expand the known spectrum of intracerebral neurilemmoma, particularly the combined tumor presentation in non-neurofibromatosis patients.
• The findings suggest a potential histogenesis from perivascular elements within the brain.
• Further research is warranted to elucidate the etiology and optimal treatment strategies for these rare intracranial tumors.