Giant Mesencephalic Dilated Virchow Robin Spaces Causing Obstructive Hydrocephalus Treated by Endoscopic Third...

Area of Science:

• Neurology
• Radiology
• Neuroimaging

Background:

• Virchow Robin spaces (VRSs) are perivascular spaces crucial for interstitial fluid drainage.
• Dilated VRSs are common findings on MRI, but giant dilatation (dVRS) is rare.
• Giant dVRSs can exert pressure on surrounding brain structures, mimicking other pathologies.

Observation:

• A 30-year-old male presented with neurological symptoms including headache, cognitive decline, and urinary issues.
• Imaging revealed a multicystic midbrain lesion extending into the third ventricle, causing obstructive hydrocephalus.
• Initial assessment suggested cystic neoplasm, but detailed MRI confirmed dVRS.

Findings:

• Giant dilatation of Virchow Robin spaces can manifest as large, multicystic lesions.
• Radiological features of dVRS can be mistaken for cystic neoplasms.
• Endoscopic third ventriculostomy successfully treated the hydrocephalus and relieved the patient's symptoms.

Implications:

• Accurate diagnosis of dVRS is critical due to its benign nature and distinct management.
• Misdiagnosis can lead to unnecessary and potentially harmful interventions like biopsy or excision.
• Awareness of dVRS and its imaging characteristics is essential for clinicians to prevent misdiagnosis and mismanagement.