Dural cavernous angioma of the posterior sagittal sinus: case report.
BACKGROUND
Extraaxial cavernous hemangiomas (cavernomas) are very rare lesions, and less than 20 descriptions of these lesions outside the middle fossa have been reported. In this report, we describe a dural cavernous angioma involving the posterior sagittal sinus and discuss the clinical, radiological, operative, and histological features of this very uncommon lesion.


METHODS
A 31-year-old right-handed male presented with headache and decreasing visual acuity. Severe bilateral papilledema was found on fundoscopic examination. Neurological examination demonstrated a minor right temporal field cut. Brain magnetic resonance imaging with contrast demonstrated a 2.5 x 2.5 cm hyperintense enhancing mass in the midline, which was contiguous with the posterior margin of the falx cerebri. The patient underwent a bilateral occipital craniotomy centered on the lesion. The histological features were consistent with cavernous angioma.


CONCLUSIONS
This report demonstrates that although extra axial cavernomas are quite rare, they must be included in the differential diagnosis of enhancing lesions along the posterior sagittal sinus. The operative removal of these lesions can be quite treacherous and usually requires a careful reapproximation of the patent sinus after lesion excision.
Boockvar
John A
JA
Weill Cornell Medical College, New York, NY 10021, USA. boockvaj@uphs.upenn.edu
Stiefel
Michael
M
Malhotra
Neil
N
Dolinskas
Carol
C
Dwyer-Joyce
Carol
C
LeRoux
Peter D
PD
D000328:Adult; D002426:Cavernous Sinus / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D002533:Cerebral Angiography; D003937:Diagnosis, Differential; D004388:Dura Mater / Q000098:blood supply / Q000000981:diagnostic imaging / Q000601:surgery*; D006392:Hemangioma, Cavernous / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008577:Meningeal Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery*