颅前窝底硬脑膜动静脉瘘的影像学分析及治疗策略

目的探讨颅前窝底硬脑膜动静脉瘘的影像学特点,并根据其而采取不同治疗方式。方法回顾性分析13例颅前窝底硬脑膜动静脉瘘病人的临床资料,病变均通过双侧眼动脉或筛前动脉供血,其中脑膜中动脉前支也参与供血7例。采用开颅手术9例,血管内治疗4例。并分析影像学特征对选择治疗方式的影响。结果术后DSA复查示所有病人的动静脉瘘均消失,均无手术并发症,术后症状逐渐好转。术后1年,DSA复查7例,均未复发。结论开颅手术治疗颅前窝底硬脑膜动静脉瘘是安全、有效的方法,对明确有硬脑膜中动脉前支供血的病变,也可行介入栓塞治疗。     

额颞眶-颧弓开颅显露基底动脉及岩骨斜坡区显微外科解剖

目的：利用额颞眶颧弓（FTOZ）开颅，结合深部骨切除对基底动脉及岩骨斜坡区的显露进行研究。方法：利用10例尸体标本20侧FTOZ开颅，在手术显微镜下切除前后床突，用于显露基底动脉上部；切除岩骨前部用于显露岩骨斜坡区。结果：单纯FTOZ开颅可良好显露基底动脉顶端，结合前后床突切除，在10例标本16侧开颅均成功显露基底动脉中段以上；颞下硬膜外切除岩骨前部（Kawase三角）可由中颅窝显露桥脑前外侧的岩骨斜坡区；在50%(10侧)的情况下其显露可低至基底动脉下端及椎动脉汇合处。结论：FTOZ开颅较常规颞下开颅的手术方向更趋前后，正确选择开颅侧别，结合前后床突切除，FTOZ开颅可用于处理基底动脉中段以上的动脉瘤；结合岩骨前部切除可用于夹闭小脑前下动脉动脉瘤等；对同时累及海绵窦及后颅窝的肿瘤，FTOZ开颅也是全切肿瘤的良好选择。     

Intracranial dural metastasis from uterine leiomyosarcoma with orbital extension

Intracranial metastases from uterine leiomyosarcoma are very rare and have been found mainly in the brain (17 cases); on the other hand, metastases to the skull, dura and orbit are really exceptional. The authors report the case of a 57-year-old woman who presented with a 6-week history of right proptosis, left hemiparesis, intracranial hypertension and torpor 8 months after surgery for uterine leiomyosarcoma. CT scan showed a very large right frontal tumor with both intracranial and intraorbital extension. At operation the tumor was found to arise from the dura of the right anterior cranial fossa; complete removal of the intracranial tumor mass and partial removal of the intraorbital component were performed. However, early tumor regrowth was observed 45 days after operation and death occurred 2 months later. Pathologic examination showed a high-grade sarcoma with smooth muscle differentiation and high mitotic activity. Immunohistochemical staining revealed positivity for actin and vimentin and negativity for S-100 protein, cytocheratin and desmin. This is the first reported case of uterine leiomyosarcoma metastatic to the dura of the anterior cranial fossa with intracranial and intraorbital extension. An aggressive surgical resection is the best treatment of intracranial metastatic leiomyosarcoma, because of the scarce response to radiotherapy and chemotherapy. However, the outcome is poor, with early recurrence.     

Modified pterional craniotomy without “MacCarty keyhole”

Pterional craniotomy is one of the most widely used approaches in neurosurgery. The MacCarty keyhole has remained the preferred means of beginning the craniotomy to achieve a low access point; however, the bone opening may result in a residual defect and an aesthetically unpleasant depression in the periorbital area. We present our modification of the traditional technique. Instead of drilling the keyhole in the frontoperiorbital area, the classical location, we perform a 5 × 15 mm strip craniectomy at the lowest accessible point in the infratemporal fossa, corresponding to the projection of the most lateral point of the sphenoid ridge. The anterior half of this opening exposes the basal frontal dura, while the posterior half brings the temporal dura into view. This modified technique was applied in 48 pterional craniotomies performed for removal of a variety of neoplasms during 2014–2015. There were no approach-related complications. Aesthetic outcomes and patient acceptance have been good; no patient developed skin depression in the periorbital area. In our experience, craniotomy for a pterional approach with the lowest possible access to the frontotemporal skull base may be performed by drilling a narrow oblong opening, without the use of any keyhole or burr hole, to create a smaller skull defect and achieve optimal aesthetic outcomes.     

内镜经鼻颅底手术中骨性解剖标志的临床意义

目的探讨内镜经鼻颅底手术中骨性解剖标志的临床意义。方法测量100例干性颅底骨性标本的相关解剖数据;并分析2000年9月～2007年3月进行的172例内镜经鼻颅底手术录像,评价中鼻甲、筛窦、蝶窦腔内骨性隆起、蝶骨翼突等作为骨性解剖标志的临床意义。结果骨性解剖数据:两侧翼突内侧板、枕髁前缘和破裂孔间距分别为26.47mm、16.92mm和19.98mm;视神经管与破裂孔、卵圆孔和下颌关节窝内缘距离约26mm、30mm和44mm。在172例内镜经鼻颅底手术中,与手术入路相关的并发症包括颈内动脉损伤1例,视神经损伤1例,其他并发症包括脑脊液鼻漏14例,蛛网膜下腔出血1例,脑膜炎致死1例;中鼻甲、筛窦、蝶窦腔内骨性隆起及蝶骨翼突是内镜经鼻前颅底、鞍区、斜坡、海绵窦、颞下窝和翼腭窝手术中指导手术的重要解剖标志。结论颅底骨性解剖标志对于内镜经鼻颅底手术有指导作用,正确认识这些解剖标志有助于提高手术安全性。     

Venous sinus compromise after pre-sigmoid,transpetrosal approach for skull base tumors: A study on the asymptomatic incidence and report of a rare dural arteriovenous fistula as symptomatic manifestation

The sigmoid sinus is routinely exposed and manipulated during pre-sigmoid, transpetrosal approaches to the skull base, but there is scant data available on the incidence of venous sinus compromise after surgery. We encountered a dural arteriovenous fistula as a result of sigmoid sinus occlusion and examined the incidence of venous sinus thrombosis or narrowing after transpetrosal surgeries. We performed a retrospective analysis of a series of patients treated by the senior surgeons (WCJ, MH, HJK), who underwent either a posterior petrosectomy or translabyrinthine approach for various skull base tumors. All available clinical and radiographic data were thoroughly examined in each patient to determine the post-operative fate of the venous sinuses. Of the 52 available patients, five patients were discovered post-operatively to have a narrowed or constricted sigmoid sinus ipsilateral to the surgery, whereas another five patients were diagnosed with asymptomatic sinus thrombosis either in the transverse or sigmoid or both. None of these patients experienced symptoms, nor were there any instance of ischemic or hemorrhagic complications. However, there was one additional patient who presented with pulsatile tinnitus 2 years after surgery. His angiogram showed an occlusion of the ipsilateral sigmoid sinus and a posterior fossa dural arteriovenous fistula. A two-stage transvenous and transarterial embolization was successful in eliminating the fistula. Technical considerations to avoid sinus injuries during pre-sigmoid, transpetrosal surgery are discussed.     

Anatomic rationale for a transmaxillary access to the cavernous sinus

W. Couldwell et al. were the first to propose a transmaxillary access to the cavernous sinus in 1997. The authors showed that this approach was low-invasive and cosmetic and it ensured visualization of different nervous formations of the cavernous sinus and the intracavernous segment of the internal carotid artery. This study was undertaken to study microsurgical anatomy, to simulate a transmaxillary access, to demonstrate its expediency, and to assess the use of endoscopic techniques when this access was applied. The study was conducted in 3 steps: 1) a craniometric study on 33 skulls and 25 craniograms to examine the craniological and geometric parameters of the anatomy of the osseous structures included into the transmaxillary access; 2) simulation of the access on the osseous structures of the skull (2 sides); by including anterior and posterior maxillotomy and bone drilling-out around the round foramen; 3) microsurgical preparation--dissection was performed on 3 head samples (5 sides) at the Laboratory of Microneurosurgical Anatomy, Acad. N. N. Burdenko Research Institute of Neurosurgery, Russian Academy of Medical Sciences. Endoscopy was tested when the transmaxillary access was applied. The results were as follows: 1. The depth of the access failed to correlate with the shape of the skull. The operative observation angle averaged 18-23 degrees. 2. Simulation of the transmaxillary access on the dried skull made it possible to visualize the medial portion of the infratemporal fossa, by enlarging the pterygpid-maxillary fissure. The bone drilling-out boundaries for the skull base were defined. 3. Microsurgical dissection after removal of the posterior maxillary sinus wall and opening the pterygopalatine fossa. The topography of the maxillary artery and nerve was studied. After drilling out the bone of the skull base, the lower wall of the cavernous sinus was crescent. The cavernous sinus was opened as far as possible both above the maxillary nerve and between the second and third branches of the trigeminal nerve. Conclusions: 1. The access is deep and narrow, yet low-traumatic. 2. It may be the access of choice in removing a small pathological focus in the pterygopalatine fossa, round foramen or lower portions of the cavernous fossa. 3. The access may be used to approach the medial portion of the infratemporal fossa. 4. The described stepwise microsurgical anatomy and internal guiding lines in the retromaxilllary space permit one to perform surgical operations with confidence. 5. With this access, there is no guidance over the great vessel (internal carotid artery). 6. The access passes through the vestibule of the mouth; in this connection its application is undesirable at surgery for intradural abnormalities.     

Skull base trauma: diagnosis and management

The singular anatomical relationship of the base of the skull is responsible for the particular problems that may arise after injury. Extensive dural laceration and severe neurovascular damage may accompany skull base injuries. Trauma to the anterior skull base is frequently related to the paranasal sinuses, and trauma to the middle and the posterior skull base usually affects the petrous bone. Injury to the anterior fossa including the paranasal sinuses may produce CSF leakage, damage the olfactory nerves, optic nerves, and orbita contents. Fractures may affect the carotid canal, injure the internal carotid artery and result in carotid-cavernous fistula. Trauma to the petrous bone may cause facial palsy and deafness, and CSF leakage with otorrhoea or paradoxal rhinoliquorrhoea. Trauma to the posterior fossa may lacerate the major venous sinuses, and affect the cranio-cervical stability. Each one of these injuries will need a particular strategy. Decision making for management as a whole must consider all aspects, including the fact that these injuries frequently involve polytraumatized patients. Decisions regarding the timing of surgery and the sequence of the surgical procedures must be made with great care. Modern surgical techniques and recent technologies including functional preservation of the olfactory nerves in frontobasal trauma, visual evoked potentials, assisted optic nerve decompression, facial nerve reconstruction, interventional technique for intravascular repair of vascular injuries, and recent developments in cochlea implants and brain stem implants, all contributed significantly to improve outcome and enhance the quality of life of patients. This article reviews basic principles of management of skull base trauma stressing the role of these advanced techniques.     

经额窦额部开颅在颅前窝和鞍区肿瘤中的应用

目的总结经额窦额部开颅在累及颅前窝和鞍区肿瘤中的应用体会。方法回顾性分析16例累及颅前窝和（或）鞍区肿瘤的开颅经验。采用将整个额窦前壁与额部骨瓣一体化开颅的方法,以增加颅底暴露范围,减少额叶牵拉和便于手术早期切断肿瘤血运。结果术后病理：脑膜瘤10例,颅咽管瘤2例,节细胞胶质瘤1例,软骨瘤1例,额筛骨瘤合并鼻源性囊肿1例,成熟畸胎瘤1例。肿瘤全切除15例,次全切除1例。无手术入路相关性并发症发生。结论经额窦额部开颅可充分暴露颅前窝,并可满意暴露侵犯颅底、鼻旁窦的肿瘤,具有脑组织牵拉轻,可以早期切断肿瘤血运的优点,且降低颅前窝重建的复杂性。     

前颅底肿瘤的手术入路与颅底重建的临床探讨

目的 探讨前颅底肿瘤的手术入路及颅底重建的价值.方法 回顾性分析浙江省肿瘤医院神经外科自1994年9月至2008年6月行手术切除并行颅底重建的47例前颅底肿瘤患者的临床资料,其中采用前颅底入路7例,扩大前颅底入路8例.颅面联合入路32例,且采用颅骨膜瓣、颅骨膜额肌瓣为主的颅底修复技术.结果 本组肿瘤全切率为70.3%(33/47),大部分切除率为25.5%(12/47),部分切除率为4.2%(2/47);并发症发生率为21.2%(10/47).结论 三种入路能完成各型前颅底肿瘤切除;运用骨膜瓣、颅骨膜额肌瓣为主的颅底修复技术安全有效,并发症少,对术后放疗有很好的放疗耐受性.     

上颌骨翻转入路切除颅底沟通肿瘤的应用解剖

目的 探讨经上颌骨翻转入路切除颅内外沟通肿瘤可行性及其显微解部学关系.方法 (1)应用显微外科解剖技术,对经甲醛固定、动静脉血管内分别灌注红、蓝乳胶的10具(20侧)尸头标本,模拟手术入路逐层解剖,观察手术径路中颢下窝、翼腭窝、蝶筛区、海绵窦等区域的显露情况及重要解剖结构之间的关系.(2)经该手术入路切除颅底沟通肿瘤6例,回顾分析其临床资料.结果 翼突、中鼻甲、上颌神经是经上颌骨翻转手术入路的三个重要解剖标志,此入路对前、中颅底、斜坡区显露满意,有充足的手术操作空间,从颅外暴露颅底,对脑组织的牵拉损伤小.临床应用中,6例肿瘤均得到全切,术后反应小,恢复快.结论 上颌骨翻转入路切除颅内外沟通肿瘤手术可行,熟悉此入路的显微解剖学关系,对开展此手术入路切除颅底沟通肿瘤具有指导意义.     

上颌骨翻转入路切除颅底沟通肿瘤的应用解剖

目的 探讨经上颌骨翻转入路切除颅内外沟通肿瘤可行性及其显微解部学关系.方法 (1)应用显微外科解剖技术,对经甲醛固定、动静脉血管内分别灌注红、蓝乳胶的10具(20侧)尸头标本,模拟手术入路逐层解剖,观察手术径路中颢下窝、翼腭窝、蝶筛区、海绵窦等区域的显露情况及重要解剖结构之间的关系.(2)经该手术入路切除颅底沟通肿瘤6例,回顾分析其临床资料.结果 翼突、中鼻甲、上颌神经是经上颌骨翻转手术入路的三个重要解剖标志,此入路对前、中颅底、斜坡区显露满意,有充足的手术操作空间,从颅外暴露颅底,对脑组织的牵拉损伤小.临床应用中,6例肿瘤均得到全切,术后反应小,恢复快.结论 上颌骨翻转入路切除颅内外沟通肿瘤手术可行,熟悉此入路的显微解剖学关系,对开展此手术入路切除颅底沟通肿瘤具有指导意义.     

上颌骨翻转入路切除颅底沟通肿瘤的应用解剖

目的 探讨经上颌骨翻转入路切除颅内外沟通肿瘤可行性及其显微解部学关系.方法 (1)应用显微外科解剖技术,对经甲醛固定、动静脉血管内分别灌注红、蓝乳胶的10具(20侧)尸头标本,模拟手术入路逐层解剖,观察手术径路中颢下窝、翼腭窝、蝶筛区、海绵窦等区域的显露情况及重要解剖结构之间的关系.(2)经该手术入路切除颅底沟通肿瘤6例,回顾分析其临床资料.结果 翼突、中鼻甲、上颌神经是经上颌骨翻转手术入路的三个重要解剖标志,此入路对前、中颅底、斜坡区显露满意,有充足的手术操作空间,从颅外暴露颅底,对脑组织的牵拉损伤小.临床应用中,6例肿瘤均得到全切,术后反应小,恢复快.结论 上颌骨翻转入路切除颅内外沟通肿瘤手术可行,熟悉此入路的显微解剖学关系,对开展此手术入路切除颅底沟通肿瘤具有指导意义.     

上颌骨翻转入路切除颅底沟通肿瘤的应用解剖

目的 探讨经上颌骨翻转入路切除颅内外沟通肿瘤可行性及其显微解部学关系.方法 (1)应用显微外科解剖技术,对经甲醛固定、动静脉血管内分别灌注红、蓝乳胶的10具(20侧)尸头标本,模拟手术入路逐层解剖,观察手术径路中颢下窝、翼腭窝、蝶筛区、海绵窦等区域的显露情况及重要解剖结构之间的关系.(2)经该手术入路切除颅底沟通肿瘤6例,回顾分析其临床资料.结果 翼突、中鼻甲、上颌神经是经上颌骨翻转手术入路的三个重要解剖标志,此入路对前、中颅底、斜坡区显露满意,有充足的手术操作空间,从颅外暴露颅底,对脑组织的牵拉损伤小.临床应用中,6例肿瘤均得到全切,术后反应小,恢复快.结论 上颌骨翻转入路切除颅内外沟通肿瘤手术可行,熟悉此入路的显微解剖学关系,对开展此手术入路切除颅底沟通肿瘤具有指导意义.     

上颌骨翻转入路切除颅底沟通肿瘤的应用解剖

目的 探讨经上颌骨翻转入路切除颅内外沟通肿瘤可行性及其显微解部学关系.方法 (1)应用显微外科解剖技术,对经甲醛固定、动静脉血管内分别灌注红、蓝乳胶的10具(20侧)尸头标本,模拟手术入路逐层解剖,观察手术径路中颢下窝、翼腭窝、蝶筛区、海绵窦等区域的显露情况及重要解剖结构之间的关系.(2)经该手术入路切除颅底沟通肿瘤6例,回顾分析其临床资料.结果 翼突、中鼻甲、上颌神经是经上颌骨翻转手术入路的三个重要解剖标志,此入路对前、中颅底、斜坡区显露满意,有充足的手术操作空间,从颅外暴露颅底,对脑组织的牵拉损伤小.临床应用中,6例肿瘤均得到全切,术后反应小,恢复快.结论 上颌骨翻转入路切除颅内外沟通肿瘤手术可行,熟悉此入路的显微解剖学关系,对开展此手术入路切除颅底沟通肿瘤具有指导意义.     

上颌骨翻转入路切除颅底沟通肿瘤的应用解剖

目的 探讨经上颌骨翻转入路切除颅内外沟通肿瘤可行性及其显微解部学关系.方法 (1)应用显微外科解剖技术,对经甲醛固定、动静脉血管内分别灌注红、蓝乳胶的10具(20侧)尸头标本,模拟手术入路逐层解剖,观察手术径路中颢下窝、翼腭窝、蝶筛区、海绵窦等区域的显露情况及重要解剖结构之间的关系.(2)经该手术入路切除颅底沟通肿瘤6例,回顾分析其临床资料.结果 翼突、中鼻甲、上颌神经是经上颌骨翻转手术入路的三个重要解剖标志,此入路对前、中颅底、斜坡区显露满意,有充足的手术操作空间,从颅外暴露颅底,对脑组织的牵拉损伤小.临床应用中,6例肿瘤均得到全切,术后反应小,恢复快.结论 上颌骨翻转入路切除颅内外沟通肿瘤手术可行,熟悉此入路的显微解剖学关系,对开展此手术入路切除颅底沟通肿瘤具有指导意义.     

上颌骨翻转入路切除颅底沟通肿瘤的应用解剖

目的 探讨经上颌骨翻转入路切除颅内外沟通肿瘤可行性及其显微解部学关系.方法 (1)应用显微外科解剖技术,对经甲醛固定、动静脉血管内分别灌注红、蓝乳胶的10具(20侧)尸头标本,模拟手术入路逐层解剖,观察手术径路中颢下窝、翼腭窝、蝶筛区、海绵窦等区域的显露情况及重要解剖结构之间的关系.(2)经该手术入路切除颅底沟通肿瘤6例,回顾分析其临床资料.结果 翼突、中鼻甲、上颌神经是经上颌骨翻转手术入路的三个重要解剖标志,此入路对前、中颅底、斜坡区显露满意,有充足的手术操作空间,从颅外暴露颅底,对脑组织的牵拉损伤小.临床应用中,6例肿瘤均得到全切,术后反应小,恢复快.结论 上颌骨翻转入路切除颅内外沟通肿瘤手术可行,熟悉此入路的显微解剖学关系,对开展此手术入路切除颅底沟通肿瘤具有指导意义.     

上颌骨翻转入路切除颅底沟通肿瘤的应用解剖

目的 探讨经上颌骨翻转入路切除颅内外沟通肿瘤可行性及其显微解部学关系.方法 (1)应用显微外科解剖技术,对经甲醛固定、动静脉血管内分别灌注红、蓝乳胶的10具(20侧)尸头标本,模拟手术入路逐层解剖,观察手术径路中颢下窝、翼腭窝、蝶筛区、海绵窦等区域的显露情况及重要解剖结构之间的关系.(2)经该手术入路切除颅底沟通肿瘤6例,回顾分析其临床资料.结果 翼突、中鼻甲、上颌神经是经上颌骨翻转手术入路的三个重要解剖标志,此入路对前、中颅底、斜坡区显露满意,有充足的手术操作空间,从颅外暴露颅底,对脑组织的牵拉损伤小.临床应用中,6例肿瘤均得到全切,术后反应小,恢复快.结论 上颌骨翻转入路切除颅内外沟通肿瘤手术可行,熟悉此入路的显微解剖学关系,对开展此手术入路切除颅底沟通肿瘤具有指导意义.     

上颌骨翻转入路切除颅底沟通肿瘤的应用解剖

目的 探讨经上颌骨翻转入路切除颅内外沟通肿瘤可行性及其显微解部学关系.方法 (1)应用显微外科解剖技术,对经甲醛固定、动静脉血管内分别灌注红、蓝乳胶的10具(20侧)尸头标本,模拟手术入路逐层解剖,观察手术径路中颢下窝、翼腭窝、蝶筛区、海绵窦等区域的显露情况及重要解剖结构之间的关系.(2)经该手术入路切除颅底沟通肿瘤6例,回顾分析其临床资料.结果 翼突、中鼻甲、上颌神经是经上颌骨翻转手术入路的三个重要解剖标志,此入路对前、中颅底、斜坡区显露满意,有充足的手术操作空间,从颅外暴露颅底,对脑组织的牵拉损伤小.临床应用中,6例肿瘤均得到全切,术后反应小,恢复快.结论 上颌骨翻转入路切除颅内外沟通肿瘤手术可行,熟悉此入路的显微解剖学关系,对开展此手术入路切除颅底沟通肿瘤具有指导意义.     

颅底脊索瘤的分型、诊断与手术

目的 探讨颅底脊索瘤的临床分型、诊断与手术。方法 1988年9月至2002年12月收治102例颅底脊索瘤病人，临床主要表现为颅神经功能损害、运动障碍、鼻咽部症状等。根据肿瘤起源和发展方向，分为鞍区型、颅中窝型、颅后窝型、鼻(口)咽型和混合型。99例病人106次分别经枕下远外侧、乳突后、前方颅底、鼻蝶、额下、颞下、侧裂、口咽和联合入路手术。肿瘤未能全切除者术后辅以放疗或放射外科治疗。结果 99例手术者，肿瘤全切除25例(25．3％)，次全或大部切除32例(32．3％)，部分切除41例(41．4％)，1例仅作活检。死亡1例(1％)。2例发生脑脊液漏，6例出现新的颅神经损害，1例偏瘫。86例平均随访5、6年，21例恢复正常工作，28例恢复部分工作，17例生活自理，9例不能自理，11例死于肿瘤复发或其他原因。结论 根据临床表现和影像学资料，多数颅底脊索瘤术前可确诊，但有些病例需与侵袭性垂体腺瘤、鼻咽癌、软骨性肿瘤(尤其软骨肉瘤)鉴别。恰当的临床分型有助于手术入路的选择。治疗应首选手术，部分肿瘤可全切除，多数不能全切者术后辅以放疗，可达到缓解症状延长存活期的目的。