Islets of meningioma in an acoustic schwannoma in a patient with neurofibromatosis-2: pathology and magnetic resonance imaging findings.
Mixed tumors of the cerebellopontine angle, composed of meningioma and schwannoma components, are extremely rare; so far, only 12 cases have been reported in the literature. They are thought to be exclusively associated with neurofibromatosis-2. We present a mixed tumor of schwannoma and meningioma in a patient with neurofibromatosis-2 and discuss the pathology and magnetic resonance imaging (MRI) findings in relation to the literature. Review of the literature shows that a typical MRI pattern has not been established for mixed tumors and it seems unlikely that a meningioma component can be differentiated within a schwannoma preoperatively.
Gelal
F
F
Department of Radiology, Izmir Ataturk Education and Research Hospital, Izmir, Turkey. fgelal@superonline.com
Rezanko
T
T
Uyaroglu
M A
MA
Tunakan
M
M
Bezircioglu
H
H
D000293:Adolescent; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008577:Meningeal Neoplasms / Q000150:complications / Q000473:pathology* / Q000601:surgery; D008579:Meningioma / Q000150:complications / Q000473:pathology* / Q000601:surgery; D018193:Neoplasms, Complex and Mixed / Q000150:complications / Q000473:pathology* / Q000601:surgery; D016518:Neurofibromatosis 2 / Q000150:complications / Q000473:pathology* / Q000601:surgery; D009464:Neuroma, Acoustic / Q000150:complications / Q000473:pathology* / Q000601:surgery