Malignant Subdural Hematoma Associated with High-Grade Meningioma

Area of Science:

• Neurosurgery
• Neuropathology
• Oncology

Background:

• Meningiomas, particularly those involving the superior sagittal sinus (SSS), can recur after surgical resection.
• Subdural hematomas (SDH) are an uncommon complication associated with meningioma.
• Anaplastic meningiomas represent a rare and aggressive subtype of meningioma.

Observation:

• A 70-year-old male with recurrent left parasagittal meningioma underwent Simpson grade II resection with SSS involvement.
• Post-operatively, the patient developed a bilateral chronic subdural hematoma (CSDH) that necessitated burr hole surgery.
• The CSDH rapidly recurred, progressing to acute subdural hematoma requiring craniotomy.

Findings:

• Histopathological examination of the brain autopsy revealed anaplastic meningioma cells infiltrating the outer membrane of the subdural hematoma.
• This finding suggests a direct relationship between the meningioma and the subdural hematoma formation.
• The case highlights a potential unique mechanism for SDH development in the context of meningioma.

Implications:

• This case suggests that meningioma-associated subdural hematomas may arise through mechanisms distinct from typical SDH etiologies.
• Further investigation into the pathophysiology of SDH in meningioma patients is warranted.
• Understanding this association could inform surgical management and post-operative care for patients with complex meningiomas.