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Saltzman type Termination site Pcom I Basilar artery between the SCA Hypoplasia and the AICA II Basilar artery above the origin of Patent the SCA IIIa Directly the SCA Patent Illb Directly the AICA Patent IIIc Directly the PICA Patent Pcom, posterior communicating artery; SCA, superior cerebellar artery; AICA, anterior inferior cerebellar artery; and PICA, posterior inferior cerebellar artery.
of California, San Francisco) details the basic concepts and tenets of aneurysm microsurgery, various craniotomies and exposures for successful clipping, and microsurgical anatomy, dissection strategies, and clipping techniques for each of the seven most common aneurysm types: posterior and anterior communicating artery, middle cerebral artery, ophthalmic artery, basilar bifurcation, pericallosal artery, and posterior inferior cerebellar artery aneurysms.
An angiogram was performed which revealed mild stenosis of the left ICA at the PCOM junction with poststenotic dilation and moderate stenosis of the right ICA at the PCOM junction with both poststenotic dilation and irregular dilation of the right vertebral artery just distal to the posterior inferior cerebellar artery.

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