Frontal Paraventricular Cysts: Refined Definitions and Outcomes

Area of Science:

• Neuroimaging
• Pediatric Radiology
• Neuropathology

Background:

• Frontal paraventricular cystic changes on neuroimaging have diverse causes, including connatal cysts, subependymal pseudocysts, necrosis, and enlarged perivascular spaces.
• Distinguishing these entities is challenging due to overlapping imaging features and varied prognoses.

Purpose of the Study:

• To refine the neuroimaging definition of frontal horn cysts.
• To correlate imaging findings with adverse clinical conditions.

Main Methods:

• A cross-sectional study analyzed a neuroimaging database of infants and children.
• Frontal paraventricular abnormalities were categorized based on location and appearance.
• Statistical tests evaluated associations between imaging findings and clinical outcomes.

Main Results:

• Of 205 exams, 35% initially diagnosed as connatal cysts were reclassified as necrosis, enlarged perivascular spaces, germinolytic cysts, septations, asymmetries, or a blood vessel.
• These entities showed significant differences in size, shape, location, and orientation (p<0.001).
• Congenital heart disease and gastrointestinal disorders were more frequent in subjects with frontal cysts and necrosis compared to enlarged perivascular spaces.

Conclusions:

• Frontal paraventricular cystic changes present a common diagnostic challenge in neuroimaging.
• Distinguishing enlarged perivascular spaces from other frontal cystic changes is vital, as the latter are associated with a more guarded prognosis.