A case of posttraumatic intradiploic meningoencephalocele is reported.
The patient presented with a progressively enlarging lump in the left
parietal area approximately 8 months after a blunt trauma. Magnetic r
esonance imaging showed an intradiploic cyst containing cerebrospinal
fluid and brain tissue. These findings were confirmed at surgery. In a
ddition, the cyst was found to have a lining of arachnoid membrane.