Q.All are true regarding intracranial lipoma except
a. subarachnoid choristomas, congenital malformations
b. due to maldifferentiation of the meninx primitive
c. most common location ---36% pericallosal, 25%
quadrigeminal/superior cerebellar cisterns
d. intracranial vessels
and cranial nerves often course around lipomas
e. interhemispheric lipomas are nearly always associated with
hypogenesis of the corpus callosum
ANS .—d
Intracranial lipomas may be defined as subarachnoid choristomas. They are
abnormal collections of fat, neither hamartomatous nor neoplastic, believed
derive from maldifferentiation of the meninx primitiva as a disorder of
development of the subarachnoid space
Intracranial
vessels (e.g., pericallosal arteries) and cranial nerves often course through,
rather than around, lipomas .
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