Arachnoid granulations in the transverse sinuses of a patient with ocular melanoma.
Arachnoid granulations show typical imaging features that allow their distinction from dural sinus thrombosis and intrasinus tumor. These features include a mid-lateral transverse sinus location, focality, common adjacent entering superficial veins, origin of attachment, low density on computed tomography (CT), isointensity-hypointensity on T1-weighted magnetic resonance imaging (MRI) and hyperintensity on T2-weighted MRI. We report the CT and MRI findings of incidentally detected bilateral arachnoid granulations in the transverse sinuses of a patient with ocular melanoma.
Apaydin
F Demir
FD
Department of Radiology, Faculty of Medicine, Mersin University, Mersin, Turkey. fdaypaydin@e-kolay.net
Yalçinoğlu
Orhan
O
Yildiz
Altan
A
Arpaci
Taner
T
Duce
Meltem Nass
MN
Ozer
Caner
C
Bagdatoglu
Celal
C
D000368:Aged; D001099:Arachnoid / Q000000981:diagnostic imaging* / Q000473:pathology*; D003392:Cranial Sinuses / Q000000981:diagnostic imaging* / Q000473:pathology*; D005134:Eye Neoplasms / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008545:Melanoma / Q000175:diagnosis*; D014057:Tomography, X-Ray Computed