Magnetic resonance characteristics of meningiomas arising from the falcotentorial junction.
We report the magnetic resonance features of meningiomas at the falcotentorial junction in six patients. Three tumors showed several characteristics on magnetic resonance images. They demonstrated hypo- or isointensity on T1-weighted images and iso- or hyperintensity on T2-weighted images. The degree of contrast between tumor and brain parenchyma, however, was less marked. The tumors often had a mottled appearance on T2-weighted images owing to their hypervascularity. All of the tumors had a peritumoral rim, and no edema was seen in adjacent brain parenchyma. With the injection of gadolinium, the tumors in all patients markedly enhanced; the adjacent dura was enhanced in four patients.
Department of Neurological Surgery, Okayama University Medical School, Japan.
S
S
Asari
N
N
Yabuno
T
T
Ohmoto
D000328:Adult; D000368:Aged; D001921:Brain / Q000473:pathology; D003287:Contrast Media; D004388:Dura Mater / Q000473:pathology*; D005260:Female; D005682:Gadolinium; D019786:Gadolinium DTPA; D006801:Humans; D007089:Image Enhancement; D008279:Magnetic Resonance Imaging; D008297:Male; D008577:Meningeal Neoplasms / Q000098:blood supply / Q000175:diagnosis* / Q000473:pathology; D008579:Meningioma / Q000098:blood supply / Q000175:diagnosis* / Q000473:pathology; D008875:Middle Aged; D009942:Organometallic Compounds; D004369:Pentetic Acid / Q000031:analogs & derivatives
D003287:Contrast Media; D009942:Organometallic Compounds; D004369:Pentetic Acid; D005682:Gadolinium; D019786:Gadolinium DTPA