Cystic meningioma: unusual imaging appearance of a common intracranial tumor.
Meningiomas are common tumors of the central nervous system that account for approximately 15% of all intracranial tumors and are the most common extra-axial neoplasm. Most meningiomas are benign, although atypical and malignant meningiomas also exist. Typical imaging characteristics include a well-circumscribed, homogeneously enhancing, extra-axial mass on both computed tomography and magnetic resonance imaging. The presence of an associated cyst is an uncommon imaging feature that may make it difficult to distinguish the tumor from a primary intra-axial glial neoplasm. The presence of peritumoral edema can also be a misleading finding. We present a case of a woman who presented with a history of multiple recent falls, decreased energy, and increased somnolence and was found to have a "cystic meningioma." Typical imaging characteristics, histologic subtypes, treatment, and prognosis are also discussed.
Departments of Radiology (Mittal, Layton, Opatowsky), Neurosurgery (Finn), and Pathology (Snipes), Baylor University Medical Center at Dallas.
Amit
A
Mittal
Kennith F
KF
Layton
S Sam
SS
Finn
George J
GJ
Snipes
Michael J
MJ
Opatowsky
AJNR Am J Neuroradiol. 1987 Jan-Feb;8(1):127-30
3101455
Arq Neuropsiquiatr. 2001 Dec;59(4):939-43
11733842
Lancet Neurol. 2006 Dec;5(12):1045-54
17110285
J Neurol Neurosurg Psychiatry. 1985 Jul;48(7):716-8
4031920
Radiographics. 1991 Nov;11(6):1087-106
1749851
Neurol India. 2000 Dec;48(4):338-42
11146597