Reversible hemianopsia caused by mechanical compression of the visual pathway by the dilated draining vein of an arteriovenous malformation--case report.
A 41-year-old woman presented with progressive hemianopsia caused by compression of the lateral geniculate body by the dilated basal vein draining a contralateral frontal arteriovenous malformation (AVM). Magnetic resonance (MR) imaging revealed left frontal AVM and right lateral geniculate body compression due to the dilated basal vein. Emergent presurgical transarterial embolization and surgical removal were performed. Left hemianopsia completely recovered 3 months after surgery and MR imaging indicated improvement of the compression of the lateral geniculate body. Direct mechanical compression of the enlarged drainage vein is one of the causes of homonymous hemianopsia. Early surgical treatment is recommended to obtain a rapid recovery.
Takigawa
Tomoji
T
Department of Endovascular Neurosurgery, Toranomon Hospital, Tokyo, Japan. t-tomojy@mx2.harmonix.ne.jp
Matsumaru
Yuji
Y
Hayakawa
Mikito
M
Fukuhara
Noriaki
N
Usui
Masaaki
M
Matsumura
Akira
A
D000328:Adult; D002550:Cerebral Veins / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D005260:Female; D005829:Geniculate Bodies / Q000473:pathology* / Q000601:surgery; D006423:Hemianopsia / Q000209:etiology* / Q000473:pathology* / Q000601:surgery; D006801:Humans; D002538:Intracranial Arteriovenous Malformations / Q000150:complications* / Q000473:pathology* / Q000601:surgery; D008279:Magnetic Resonance Imaging; D011859:Radiography; D014795:Visual Pathways / Q000098:blood supply* / Q000473:pathology* / Q000601:surgery