Juvenile pilocytic astrocytoma in association with arteriovenous malformation.
Pilocytic astrocytomas are highly vascular, relatively common primary brain tumors in the pediatric population, but their association with a true arteriovenous malformation (AVM) is extremely rare. We describe an eight-year-old girl with a right supratentorial juvenile pilocytic astrocytoma (WHO grade I) with an angiographically documented AVM entangled in the tumor mass who presented with intracranial hemorrhage due to a ruptured anterior choroidal artery pseudoaneurysm encased in the lesion. The AVM nidus as well as the hemorrhage site was embolized with Onyx. A literature review revealed only one previous report of a true intermixture of these two lesions. We hypothesize whether the association of vascular malformations and primary brain tumors are merely coincidental or if they point to the existence of a distinct entity and/or a common etiologic factor.
Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA. m-soltanolkotabi@northwestern.edu
M
M
Soltanolkotabi
S E
SE
Schoeneman
A J
AJ
Dipatri
M C
MC
Hurley
S A
SA
Ansari
V
V
Rajaram
T
T
Tomita
A
A
Shaibani
D001254:Astrocytoma / Q000150:complications* / Q000175:diagnosis* / Q000628:therapy; D002533:Cerebral Angiography; D002648:Child; D003287:Contrast Media; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D002538:Intracranial Arteriovenous Malformations / Q000175:diagnosis* / Q000209:etiology* / Q000628:therapy; D018810:Magnetic Resonance Angiography; D009460:Neurologic Examination; D014057:Tomography, X-Ray Computed
D003287:Contrast Media