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Joseph Junewick, MD FACR
over 12 years ago
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Frontal Foramina

Case Detail

Anatomy: Brain-Spine
Joseph Junewick, MD FACR
Diagnostic Category: Developmental or Congenital
Created: over 8 years ago
Updated: over 8 years ago
Tags: PEDS
Modality/Study Types: CT MR
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1 year old male with developmental delay.

Case Images


Frontal Foramina


CT – Paramedian frontal transdiploic defects and posterior fossa arachnoid cyst.

MR – Dysgenesis of corpus callosum, fused thalami, and posterior fossa cyst.


Frontal foramina are paired focal osseous deficiencies of the frontal bones. The etiology of frontal foramina is unknown although highly associated with congenital hydrocephalus and other central nervous system malformations (Chiari II, Dandy-Walker) . The frontal plates and metopic suture are otherwise normal. Frontal foramina ossify away from the sutures whereas calvarial ossification progresses toward the sutures. The presence of frontal foramina should prompt search for underlying CNS malformation. Differential considerations include cranium bifidum, lacunar skull, eosinophilic granuloma, and epidermoid.


Sun JK, LeMay DR, Couldwell WT, et al. Frontal foramina in pediatric skull in cases of congenital hydrocephalus. Radiology (1995):197:497-499

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