Syndrome simulating pseudotumor cerebri caused by partial transverse venous sinus obstruction in metastatic prostate cancer.
OBJECTIVE
To report a case of partial transverse venous sinus obstruction causing a syndrome resembling pseudotumor cerebri.


METHODS
Case report. A 61-year-old man developed decreased vision, bilateral papilledema, and a highly increased cerebrospinal fluid opening pressure. Brain magnetic resonance imaging (MRI) disclosed a small, extra-axial mass near the torcula, which was dismissed as an incidental meningioma because cerebral angiography showed sinus patency.


RESULTS
The patient's vision worsened. Biopsy of the enlarging mass disclosed metastatic prostate cancer. After radiation therapy, the mass shrank, magnetic resonance angiography disclosed reopening of the transverse sinuses, and papilledema resolved, but visual fields remained severely compromised.


CONCLUSIONS
Partial blockage of the dural venous sinus by a small mass near the torcula can cause a sufficient increase in intracranial pressure to produce vision-threatening papilledema.
Kim
A W
AW
W.K. Kellogg Eye Center, Department of Ophthalmology, The University of Michigan, Ann Arbor, USA.
Trobe
J D
JD
D000230:Adenocarcinoma / Q000097:blood / Q000532:radiotherapy / Q000556:secondary*; D001921:Brain / Q000473:pathology; D001932:Brain Neoplasms / Q000097:blood / Q000532:radiotherapy / Q000556:secondary*; D002533:Cerebral Angiography; D003937:Diagnosis, Differential; D006801:Humans; D019586:Intracranial Hypertension / Q000209:etiology / Q000503:physiopathology; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010211:Papilledema / Q000209:etiology / Q000503:physiopathology; D017430:Prostate-Specific Antigen / Q000097:blood; D011471:Prostatic Neoplasms / Q000097:blood / Q000473:pathology* / Q000532:radiotherapy; D011559:Pseudotumor Cerebri / Q000175:diagnosis / Q000209:etiology*; D012851:Sinus Thrombosis, Intracranial / Q000150:complications* / Q000175:diagnosis; D013577:Syndrome; D014057:Tomography, X-Ray Computed; D014786:Vision Disorders / Q000209:etiology / Q000503:physiopathology; D014792:Visual Acuity
D017430:Prostate-Specific Antigen