Sudden, unexpected death due to fourth ventricular subependymoma

Area of Science:

• Neuropathology
• Neuro-oncology
• Sudden Death Syndromes

Background:

• Subependymomas are slow-growing glial tumors typically found in the fourth ventricle.
• These tumors are generally considered benign and asymptomatic, rarely causing sudden death.
• The subependymal glomerate astrocytoma is a rare subtype of subependymoma.

Observation:

• A 60-year-old male presented with sudden, unexpected death.
• Autopsy revealed a fourth ventricular subependymoma (subependymal glomerate astrocytoma) as the cause of death.
• The tumor was uncomplicated by hemorrhage or significant mass effect.

Findings:

• This case represents the first documented instance of sudden, unexpected death caused by an uncomplicated fourth ventricular subependymoma.
• The subependymal glomerate astrocytoma subtype was identified.
• The mechanism of death, despite the lack of typical obstructive or hemorrhagic complications, remains to be fully elucidated.

Implications:

• Highlights the potential for rare, fatal outcomes even from generally benign brain tumors.
• Underscores the importance of considering subependymoma in the differential diagnosis of sudden, unexplained deaths.
• May prompt further investigation into the pathophysiology of sudden death associated with fourth ventricular tumors.