"Intradiploic encephaloceles are a rare form of encephalocele. Brain (and sometimes CSF) herniate through adefect in the inner table of the calvarium, expanding the diploic space, but the outer table is intact. They are usually acquired, (post-traumatic or post-surgical) and are rarely congenital 1."
"They may present with focal neurological deficits, seizures or local swelling, depending on the location and size 7,8."
"There are usually described in the parietal and occipital calvarium, also the frontal region 2,6."