CT evaluation of nonventricular CSF space disease

Area of Science:

• Neuroradiology
• Neuroimaging
• Central Nervous System (CNS) Pathology

Background:

• Many central nervous system (CNS) lesions present with altered attenuation, ventricular shift, or contrast enhancement.
• However, some lesions are primarily located within the nonventricular cerebrospinal fluid (CSF) spaces.
• These CSF space lesions may deform or be visible within these spaces, posing diagnostic challenges.

Purpose of the Study:

• To review the imaging characteristics of lesions confined to nonventricular CSF spaces.
• To emphasize the role of abnormal contrast enhancement in identifying these lesions.
• To present the spectrum of diseases affecting these specific anatomical locations.

Main Methods:

• Review of neuroimaging studies featuring lesions predominantly in nonventricular CSF spaces.
• Analysis of lesion characteristics including deformation of CSF spaces and contrast enhancement patterns.
• Correlation of imaging findings with histopathological diagnoses where available.

Main Results:

• Lesions confined to nonventricular CSF spaces may not exhibit typical signs like ventricular shift.
• Deformation of CSF spaces and abnormal contrast enhancement are crucial diagnostic indicators.
• The spectrum of identified diseases includes meningitis, isodense subarachnoid hemorrhage, isodense subdural hematoma, neoplastic seeding, isodense tumors, and brain herniations.

Conclusions:

• Lesions within nonventricular CSF spaces require specific diagnostic considerations beyond typical CNS lesion indicators.
• Abnormal contrast enhancement is a key feature for identifying these lesions.
• Accurate identification aids in diagnosing a range of critical neurological conditions affecting the CSF spaces.