Fourth Ventricular Epidermoid Cyst - Case Series, Systematic Review and Analysis

Area of Science:

• Neurosurgery
• Neurology
• Pathology

Background:

• Epidermoid cysts are slow-growing, avascular lesions typically found in the cerebellopontine region.
• While rare, fourth ventricular location presents diagnostic and therapeutic challenges.
• Symptomatic presentation often occurs only after significant tumor growth.

Purpose of the Study:

• To review the clinical characteristics, management, and outcomes of fourth ventricular epidermoid cysts.
• To identify factors influencing patient outcomes and recurrence rates.

Main Methods:

• A systematic review of 58 studies involving 131 patients with fourth ventricular epidermoid cysts.
• Analysis of variables including demographics, symptoms, hydrocephalus, extent of resection, and complications.
• Statistical analysis to determine predictors of outcome.

Main Results:

• Cerebellar dysfunction (93%) and abducens nerve involvement (28.46%) were most common.
• Preoperative hydrocephalus occurred in 35% of patients.
• Total resection and absence of preoperative cranial nerve deficits correlated with improved outcomes (P=0.001 and P=0.004, respectively).
• Longer duration of symptoms (DOS) was linked to increased cranial nerve involvement (P=0.03).
• Aseptic meningitis occurred in 14.5% of cases; recurrences were rare (n=9).

Conclusions:

• Fourth ventricular epidermoid cysts require early and complete surgical extirpation.
• Delayed intervention increases the risk of cranial nerve dysfunction and negatively impacts outcomes.
• Despite challenges in early detection, prompt surgical management is key to favorable results.