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. Author manuscript; available in PMC: 2014 Feb 13.

Published in final edited form as: Neurosurgery. 2012 Dec;71(6):1111–1124. doi: 10.1227/NEU.0b013e318271c081

Cerebellar AVM, petrosal subtype. The petrosal AVM lies in the anterior cerebellum facing the petrous bone, lateral to cranial nerves VII and VIII, and extending into the cerebellopontine angle, as seen on these (A) superior and anterior views. AICA is the main arterial feeder to these AVMs. This petrosal cerebellar AVM in a 57 year-old man (Spetzler-Martin grade III- (S1V1E1), supplementary grade III (A3U0D0)) was fed by a large right anterior inferior cerebellar artery, as seen on left vertebral artery digital subtraction angiography ((B) anteroposterior and (C) lateral views). (D) An extended retrosigmoid craniotomy exposed the AVM in the cerebellopontine angle around cranial nerves VII and VIII. Note CN IX, X, and XI below the nidus. (E) Dissection through the flocculus exposed the lateral margin and feeding arteries along the superior and inferior margins. The medial margin was accessed by deepening the dissection to and along the pontine surface.

Abbreviations: BA = basilar artery; AICA = anterior inferior cerebellar artery; PICA = posterior inferior cerebellar artery; SCA = superior cerebellar artery; PCA = posterior cerebral artery; SS = straight sinus; SPS = superior petrosal sinus;PV = petrosal vein; AHV = anterior hemispheric vein; VCPF = vein of the cerebellopontine fissure; V = trigeminal nerve; VI = abducens nerve; VII = facial nerve; VIII = vestibulocochlear nerve; IX = glossopharyngeal nerve; X = vagus nerve; XI = accessory nerve; XII = hypoglossal nerve.

Cerebellar AVM, petrosal subtype. The petrosal AVM lies in the anterior cerebellum facing the petrous bone, lateral to cranial nerves VII and VIII, and extending into the cerebellopontine angle, as seen on these (A) superior and anterior views. AICA is the main arterial feeder to these AVMs. This petrosal cerebellar AVM in a 57 year-old man (Spetzler-Martin grade III- (S1V1E1), supplementary grade III (A3U0D0)) was fed by a large right anterior inferior cerebellar artery, as seen on left vertebral artery digital subtraction angiography ((B) anteroposterior and (C) lateral views). (D) An extended retrosigmoid craniotomy exposed the AVM in the cerebellopontine angle around cranial nerves VII and VIII. Note CN IX, X, and XI below the nidus. (E) Dissection through the flocculus exposed the lateral margin and feeding arteries along the superior and inferior margins. The medial margin was accessed by deepening the dissection to and along the pontine surface.

Abbreviations: BA = basilar artery; AICA = anterior inferior cerebellar artery; PICA = posterior inferior cerebellar artery; SCA = superior cerebellar artery; PCA = posterior cerebral artery; SS = straight sinus; SPS = superior petrosal sinus;PV = petrosal vein; AHV = anterior hemispheric vein; VCPF = vein of the cerebellopontine fissure; V = trigeminal nerve; VI = abducens nerve; VII = facial nerve; VIII = vestibulocochlear nerve; IX = glossopharyngeal nerve; X = vagus nerve; XI = accessory nerve; XII = hypoglossal nerve.