The Experts below are selected from a list of 21 Experts worldwide ranked by ideXlab platform

Nobuhito Saito - One of the best experts on this subject based on the ideXlab platform.

  • Current concept of cerebral aneurysms arising at nonbranching sites.
    World Neurosurgery, 2010
    Co-Authors: Hirofumi Nakatomi, Nobuhito Saito
    Abstract:

    he origin and pathogenesis of cerebral aneurysms arising at onbranching sites are unclear. Some are considered to be elated to tiny branches such as the Superior Hypophysial Artery, ut there is no evidence to relate others to an arterial branch. ntracranial fusiform aneurysms have been considered to be therosclerotic in origin. Several recent reports suggested nontherosclerotic pathologic change could cause fusiform and olichoectatic aneurysm formation, however (4). We summarize he current concept of pathogenesis, imaging studies, natural istory, and treatment modalities of cerebral aneurysms arising t nonbranching sites and discuss when and how these should e treated in the setting of proximal A1 aneurysms.

Lu Xiao-jie - One of the best experts on this subject based on the ideXlab platform.

  • Quantitative study of microsurgical anatomy in sellar region via the transpterional keyhole approach assisted by neuro-navigation
    Chinese journal of clinical anatomy, 2009
    Co-Authors: Lu Xiao-jie
    Abstract:

    Objective:To explore quantitatively microsurgical anatomy in sellar region via the transpterional keyhole approach assisted by neuro-navigation.Methods:15 silicone-injected adult cadaveric heads were dissected under operating microscope.The microstructures of sellar region were observed.The parameters of spaces ofⅠ,Ⅱ,Ⅲ,Ⅳ andⅤwere quantified by neuro-navigation.Results:The transpterional keyhole approach could expose five spaces very clearly.The areas of Ⅰ,Ⅱ,Ⅲ,Ⅳ and Ⅴspaces were(22.23± 2.12)mm2,(63.42 ±7.84)mm2,(64.96 ±5.43)mm2,(26 ±5.85)mm2,and(16.64 ±2.97)mm2 respectively.Bilateral optic nerve,optic chiasma,sellae diaphragma and stalk Hypophysial,and controlateral internal carotid Artery,ophthalmic Artery and Superior Hypophysial Artery were well observed.Transpterional keyhole approach was more advantageous to view the Ⅱ、Ⅲ andⅤspace,especially the exposure for PcoA and AchA.The bifurcation of A1、M1 and the course of oculomotornerve in cistern could be well observed through the Ⅱ、Ⅲ and Ⅴ space.Conclusions:The transpterional keyhole approach could well expose the interspaces in sellar region,which is reliable to view sellar and parasellar structures through the Ⅱ、Ⅲ andⅤspace,as well the exposure of the origin and branches of PcoA and AchA.

Hirofumi Nakatomi - One of the best experts on this subject based on the ideXlab platform.

  • Current concept of cerebral aneurysms arising at nonbranching sites.
    World Neurosurgery, 2010
    Co-Authors: Hirofumi Nakatomi, Nobuhito Saito
    Abstract:

    he origin and pathogenesis of cerebral aneurysms arising at onbranching sites are unclear. Some are considered to be elated to tiny branches such as the Superior Hypophysial Artery, ut there is no evidence to relate others to an arterial branch. ntracranial fusiform aneurysms have been considered to be therosclerotic in origin. Several recent reports suggested nontherosclerotic pathologic change could cause fusiform and olichoectatic aneurysm formation, however (4). We summarize he current concept of pathogenesis, imaging studies, natural istory, and treatment modalities of cerebral aneurysms arising t nonbranching sites and discuss when and how these should e treated in the setting of proximal A1 aneurysms.

Li Jun - One of the best experts on this subject based on the ideXlab platform.

  • Endoscopic Anatomy Study of Operative Fissures in Sellar Region via Pterional Keyhole Approach
    Clinical neurosurgery, 2003
    Co-Authors: Li Jun
    Abstract:

    Objective To study the endoscopic anatomy characters of the operative fissures in the sellar region and the value of neuroendoscope to the operation of sellar region via pterional key-hole approach.Method Endoscopic anatomy study of the 3 operative fissures in sellar regions of 15 cadaver heads were performed under a neuroendoscope.Results Fissure Ⅰ is the best way to observe the medial wall of contralateral ICA and the Superior Hypophysial Artery stemming from it.The ipsilaleral Superior Hypophysial arteiy from the ICA was observed through fissure Ⅱ.PCoA and its branches stand in the way to observe BA.By endoscopes,the PCoA and AchoA behind ICA can be observed without traction.BA was found through fissure Ⅲ without any obstruct.The structures of the 3rd ventricle floor were observed by an angulated endoscope.Conclusions The some intracranial anatomic structures can be panoramicolly observed by the endoscopes.The details of the anatomic structures can clearly be studied and the structures under the shadow of nerves and vessels can be seen through the endoscope.

Arthur J. Ulm - One of the best experts on this subject based on the ideXlab platform.

  • Fenestrated vertebrobasilar junction aneurysm: diagnostic and therapeutic considerations.
    Journal of neurosurgery, 2009
    Co-Authors: Erminia Albanese, Antonino Russo, Arthur J. Ulm
    Abstract:

    Vertebrobasilar junction (VBJ) aneurysms are uncommon and are often found in association with basilar Artery (BA) fenestration. The complex anatomical environment of the VBJ, and the complicated geometry of the fenestration make clipping of these aneurysms difficult. Therefore, endovascular treatment of these aneurysms is now widely accepted. The authors describe the case of a 43-year-old woman with sickle cell anemia. She presented with subarachnoid hemorrhage. Digital subtraction angiography was performed and depicted multiple intracranial aneurysms. The patient had a left Superior Hypophysial Artery aneurysm, a right Superior cerebellar Artery-posterior cerebral Artery aneurysm, and a VBJ aneurysm associated with a fenestration of the BA. The VBJ aneurysm was not identified on the initial angiogram and was only revealed after 3D rotational angiography was performed. The 3D reconstruction was critical to the understanding of the complex geometry associated with the fenestrated BA. The VBJ was reconstructed using a combination endovascular technique. The dominant limb of the fenestration was stented and balloon-assisted coiling was performed, followed by sacrifice of the nondominant vertebral Artery using coils and the embolic agent Onyx. Postoperative angiography demonstrated successful occlusion of the aneurysm with reconstruction of the VBJ. To the authors' knowledge, this is the first report of a fenestrated VBJ aneurysm treated with the combination of stenting, balloon remodeling, coiling, and vessel sacrifice. Three-dimensional angiography was critical in making the correct diagnosis of the source of the subarachnoid hemorrhage and with operative planning.