A small number of intracranial meningiomas have atypical MR appearance which can lead to misdiagnosis. We present the MR features of 14 atypical meningiomas.
Meningiomas characterized as atypical either because of their MR features (extensive necrosis, association with large cysts or neoplasms, haemorrhage, scarring) or their location (intradiploic, intraventricular, extradural extension). Four cases (28,5%) were misdiagnosed initially as other lesions based on MR findings alone. In all cases with MR atypicality the diagnosis was confirmed surgically.
MaiuriFBenvenutiD: Cystic lesions associated with meningiomas. Surg Neurol26: 511–597, 1986.
11.
BowenHBurgerP: Meningiomas associated with large cysts with neoplastic cells in the cyst walls. J Neurosurg55: 473–478, 1981.
12.
DellSGantiSR: Cystic meningiomas: A clinico-radiological study. J Neurosurg57: 8–13, 1982.
13.
GoKGHewJM: Cystic lesions of the brain. A classification based on pathogenesis, with consideration of histological and radiological features. Eur J Radiol17: 69–84, 1993.
14.
RengacharySBatnitzskyS: Cystic lesions associated with intracranial meningiomas. Neurosurgical4: 107–114, 1979.
15.
PitkethlyDTHadmanJM: Angioblastic meningiomas; clinicopathologic study of 81 cases. J Neurosurg32: 539–544, 1970.
NewPFJAronowSHesselinkJR: National Cancer Institute study: Evaluation of computed tomography in the diagnosis of intracranial neoplasms. IV Meningiomas. Radiology136: 665–675, 1980.
19.
JelinekJSmirniotopoulosJG: Lateral ventricular neoplasms of the brain: Differential diagnosis based on clinical CT and MR findings. Am J Neuroradiol11: 567–574, 1990.
20.
HalpinSFSBrittonJ: Intradiploic meningiomas. A radiological study of two cases confirmed histologically. Neuroradiology33: 247–250, 1991.
21.
PompiliACaroliF: Intradiploic meningioma of the orbital roof. Neurosurgery12: 565–568, 1983.
22.
KimKRogersLLeeC: The dural lucent line: Characteristic sign of hyperostosing meningioma en plaque. Am J Radiol141: 1217–1221, 1983.
23.
BydderGMKingsleyDPE: MR imaging of meningiomas including studies with and without gadolinium-DTPA. J Comput Assist Tomogr9: 690–697, 1985.
24.
AhmadiJHintonD: Dural invasion by craniofacial and calvarial neoplasms: MR imaging and histopathologic evaluation. Radiology188: 747–749, 1993.
