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Neurology 2000;54:1175-1178
© 2000 American Academy of Neurology
Articles

Enlarged parietal foramina

Association with cerebral venous and cortical anomalies

Alyssa T. Reddy, MD, Gary L. Hedlund, DO and Alan K. Percy, MD

From the Departments of Pediatrics (Drs. Reddy and Percy), Neurology (Drs. Reddy and Percy), and Radiology (Dr. Hedlund), University of Alabama at Birmingham and The Children’s Hospital of Alabama, Birmingham.

Address correspondence and reprint requests to Dr. Alyssa T. Reddy, 1600 7th Avenue South, Suite 516 ACC, The Children’s Hospital of Alabama, Birmingham, AL 35233.

OBJECTIVE: To evaluate a series of patients with enlarged parietal foramina for associated brain anomalies.

BACKGROUND: Enlarged parietal foramina are usually considered a benign calvarial defect.

METHODS: Ten patients with enlarged parietal foramina were identified. Seven patients were evaluated with neuroimaging: two by cranial CT and five by CT and/or MRI. Three patients who underwent MRI also underwent MR angiography or MR venography.

RESULTS: Six of seven patients had cranial imaging showing a persistent falcine venous sinus. Three of six patients had variations of occipital cortical infolding. One patient had focal encephalomalacia in close proximity to the persistent falcine venous sinus and one had a previously undiagnosed atretic occipital encephalocele.

CONCLUSION: This constellation of findings suggests that aberrant vascular evolution during fetal development may affect cerebrovascular, brain, or skull development. Individuals with enlarged parietal foramina (>5 mm) warrant imaging of underlying brain parenchyma and vasculature.

Key words: Parietal foramina—Persistent falcine vein—Emissary veins.




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