Cavernous Segment Of Internal Carotid Artery Research Articles

PK Papyrus covered stent to treat traumatic pseudoaneurysm of the internal carotid artery – A technical note and review of the literature

Intracranial pseudoaneurysms account for approximately 1% of all intracranial aneurysms and are associated with high rebleeding risk and mortality. Traditional treatments of these lesions include microsurgical or endovascular reconstruction and parent vessel sacrifice. Reconstruction of the vessel is challenging due to poor vessel integrity and incomplete wall structure. An alternative endovascular reconstructive treatment includes deployment of a covered stent. Original covered stents such as the Jostent Graftmaster and the Willis stent suffer from stiff constructs that limit deployment in tortuous anatomy. The PK Papyrus covered coronary stent may be a satisfactory treatment alternative for these lesions. We present a case of an enlarging traumatic distal cavernous segment internal carotid artery pseudoaneurysm treated with trans-radial deployment of a PK Papyrus stent at our institution. We propose that the PK Papyrus covered stent may be an alternative reconstructive endovascular treatment for intracranial pseudoaneurysms. Further larger scale prospective case series would provide further support for this management strategy.

Abstract Number ‐ 115: A Case of Post‐Pipeline Headache : New Post‐Flow Diversion Headaches for Intracranial Aneurysm

Introduction Flow diversion using devices such as the “pipeline” stent is now a common treatment for unruptured intracranial aneurysms. Though much is known about the efficacy of the device, less is reported regarding potential side effects. We aimed to describe a case of giant aneurysm with new onset and severe headache Post‐ Pipeline flow diversion stent application. Methods A 70‐year‐old female patient was admitted to the neurology outpatient clinic with complaints of diplopia and drooping of the left eyelid that started three months ago. Neurological examination revealed decreased visual acuity and total ophthalmoplegia in the left eye. In neuroimaging,semi‐thrombosed aneurysm, 20*25*20 mm in size, compressing the optic nerve and cavernous structures was observed in the left internal carotid artery cavernous segment. In digital subtraction angiography, a narrow neck, 20*25*22 mm giant aneurysm was observed in the left ICA C4 segment in three‐dimensional imaging. In premedication, were started seven days ago acetylsalicylic acid 100 mg 1*1 and 48 hours ago ticagrelol 2*90 mg and Pipeline 4.25*30 mm flow diverter was applied to cover the aneurysm neck under general anesthesia. One day after the procedure, the patient developed a new headache behind the left eye, throbbing, sensitive to sound and light, unresponsive to paracetamol and non‐steroidal anti‐inflammatory agents.In contrast‐enhanced cranial MRI, an aneurysm causing a central thrombosed hypointense mass effect was observed in the left cavernous structure neighbor with a peripheral enhanced, hyperintense T2 Flair sequence compatible with peripheral vasogenic edema. Pulse 1 gram/day steroid treatment was applied to the patient for three days.The patient’s headache completely regressed at the end of the third month, and perianeurysmal inflammation disappeared in the same contrast‐enhanced cranial MRI.In the 12th month post‐procedure imaging of the patient, it was observed that the aneurysm was completely occluded. Results In the case, we reporta patient with neurologic worsening after flow‐diverter treatment for unruptured cerebral aneurysms. We found MR imaging evidence of perianeurysmal brain inflammation after the therapeutic thrombosis of the sac to be the main cause explaining clinical aggravation. Consequently, we may consider a perianeurysmal brain inflammation when encountering the association of a postprocedure headache with an increase in previous compressive signs, possibly associated with MR imaging signs of inflammation1,2. We tried pulse steroid therapy, which is accepted as the first‐line treatment for postimplantation syndrome after endovascular repair of aortic aneurysms in the literature for a patient who did not respond dramatically to nonsteroidal anti‐inflammatory therapy3.We experienced a significant improvement in the patient’s clinical findings and contrast‐enhanced MRI findings after steroid treatment. Conclusions An inflammatory reaction may aggravate, transiently, clinical symptoms after aneurysm treatment with a flow‐diverter device. Further research is needed to better understand the underlying mechanisms as well as to achieve better prevention strategies.

Cavernous segment internal carotid artery stenosis specific to meningiomas compared to pituitary adenomas.

Pituitary macroadenomas and meningiomas are common neoplasms arising within the cavernous sinus. Imaging characteristics on MRI can often distinguish these tumors from one another; however, some cases may be more difficult to differentiate. This study compares patterns of cavernous segment internal carotid artery (CS-ICA) stenosis between the two tumor types to establish a novel radiographic method of differentiation. A retrospective analysis of patients with pathology-confirmed meningioma and pituitary adenomas at Tufts Medical Center was performed. The diameter of the CS-ICA at the narrowest point within the cavernous sinus was measured and compared to the ipsilateral petrous segment ICA and contralateral CS-ICA. The mean and range of percent stenosis and frequency of cases of CS-ICA stenosis >15% were determined. Statistical analysis to compare the groups was conducted using the Chi-squared test, Fisher's exact test, and t-test. There were a total of 78 out of 231 patients who were included in the study. The mean % ICA stenosis for all meningiomas was 9.3%, with increasing stenosis with increasing World Health Organization grade. Of all meningioma cases, 13 (33%) had greater than 15% ICA stenosis. Mean ICA stenosis for pituitary adenomas was -1.48%. There were no cases of pituitary adenomas causing ICA stenosis >15%. Differentiating pituitary adenomas and intracavernous meningioma tumors can have important implications on surgical approach and outcome. Our study found that stenosis of the CS-ICA greater than 15% is highly specific to meningiomas and can serve as a radiologic sign to distinguish between these two tumors.

A Giant Pituitary Adenoma Can Coexist with an Incidental Aneurysm: Look Beyond the Pituitary Adenoma and Don't Miss the Diagnosis

An intracranial aneurysm in a pituitary adenoma (PA) is not uncommon; however, preoperative angiography is not clinically used as a routine screening test for PA patients. Therefore an intracranial aneurysm is often missed while diagnosing PA patients. When an aneurysm is missed in patients with pituitary tumors, the supporting power by the tumor to the blood vessels or aneurysm will disappear when the tumor is removed and patients may suffer intraoperative or postoperative aneurysm rupture, which may lead to fatal, catastrophic hemorrhage. Herein, we report a case of a PA patient with the signal shadow of vessel flow void, observed vaguely in the right internal carotid artery cavernous segment on magnetic resonance imaging, and a small aneurysm was found via digital subtraction angiography. In order to ensure the safety of surgery, we first performed embolization of the aneurysm and then resected the tumor.

Extracranial-Intracranial High-Flow Bypass with Internal Carotid Artery Ligation at Neck for Giant Cavernous Internal Carotid Artery Dissecting Aneurysm in a Teen Girl with Postoperative Unusual Complication of Mono-ocular Blindness: A Case Report

AbstractExtracranial-intracranial (EC-IC) high-flow bypass with internal carotid artery (ICA) ligation at the neck is an important treatment option for giant cavernous ICA dissecting aneurysm. Such treatment may be associated with many complications. We report a case that developed postoperative mono-ocular blindness. So far to our knowledge such complication has not been reported in the literature. A 14-year-old girl presented with recent headache, eye ache, occasional double vision, and occasional right-sided visual impairment. Neurologic examination revealed no abnormality. Computed tomographic (CT) scan of the head showed a large, right parasellar, and mostly hyperdense space-occupying lesion. CT angiogram of the brain showed giant dissecting aneurysm of right-sided cavernous segment ICA. A right-sided external carotid artery–radial artery graft–middle cerebral artery (ECA-RAG-MCA [M2]) high-flow bypass was done with ligation of the right ICA in the neck. Postoperatively, the patient developed complete, mono-ocular, and permanent blindness on right side. Mono-ocular blindness is a serious complication from ophthalmic/central retinal artery thrombosis in high-flow EC-IC bypass with ICA ligation. Strategy is required to find and to set for its prevention.

Endoscopic Endonasal Clipping of Anterior Circulation Aneurysm: Surgical Techniques and Results

Endoscopic endonasal clipping of intracranial aneurysms may use microsurgical techniques as an alternative to the transcranial approach. Here we report a series of patients who underwent microsurgical clipping of anterior circulation aneurysms via an endoscopic endonasal approach (EEA). This retrospective chart review included all the patients who underwent standard binostril EEA for aneurysm clipping. Surgical outcomes and complications are noted. The rationality and limitations of this procedure are discussed. Seven patients with 12 aneurysms of the anterior circulation underwent EEA for clipping. These 12 aneurysms consisted of 5 anterior communicating artery (AComA) aneurysms, 4 paraclinoid aneurysms, 1 ophthalmic artery aneurysm, and 2 aneurysm located in the cavernous segment of internal carotid artery (ICA). Nine of the 12 aneurysms were successfully clipped. One giant paraclinoid aneurysm could not be clipped during operation and was coiled in second endovascular stage. The 2 aneurysms located in the cavernous segment of ICA were not clipped intentionally in a single-stage procedure, after weighing the surgical benefit against the difficulty of surgical exposure and feasibility. The proximal control of ICA was achieved in all cases. There was no death, no cerebrospinal fluid leak, or other complications. All patients recovered completely. EEA can provide direct access for microsurgical clipping of strictly selected anterior circulation aneurysms. All the principles of cerebrovascular surgery must be followed. These procedures require a long learning curve. Only teams with adequate experience in microvascular and endoscopic skull base surgeries should attempt this approach for treating aneurysms.

Posttraumatic Cavernous Segment Internal Carotid Artery Aneurysmal Rupture Presenting as Tentorial Subdural Hematoma

Traumatic aneurysm rupture following a closed head injury is rare. The rupture of a cavernous internal carotid artery (ICA) aneurysm following a head injury presenting as a tentorial subdural hematoma has not been reported in the literature. We discuss a 50-year-old woman with a closed head injury with her initial computed tomography scan showing a tentorial subdural hematoma. Further investigations revealed the presence of a ruptured cavernous ICA aneurysm. We also conducted a literature review of posttraumatic ICA aneurysmal rupture.

Quantitative analysis of anatomical relationship between cavernous segment internal carotid artery and pituitary macroadenoma.

Cavernous segment internal carotid artery (CSICA) injury during endoscopic transsphenoidal surgery for pituitary tumor is rare but fatal. The aim of this study is to investigate anatomical relationship between pituitary macroadenoma and corresponding CSICA using quantitative means with a sense to improve safety of surgery.In this retrospective study, a total of 98 patients with nonfunctioning pituitary macroadenomas undergoing endoscopic transsphenoidal surgeries were enrolled from 2005 to 2014. Intercarotid distances between bilateral CSICAs were measured in the 4 coronal levels, namely optic strut, convexity of carotid prominence, median sella turcica, and dorsum sellae. Parasellar extension was graded and recorded by Knosp–Steiner classification.Our findings indicated a linear relationship between size of pituitary macroadenoma and intercarotid distance over CSICA. The correlation was absent in pituitary macroadenoma with Knosp–Steiner grade 4 parasellar extension.Bigger pituitary macroadenoma makes more lateral deviation of CSICA. While facing larger tumor, sufficient bony graft is indicated for increasing surgical field, working area and operative safety.

O-003 Resolution of Cranial Neuropathies Following Treatment of Intracranial Aneurysms with the Pipeline Embolization Device

IntroductionIntracranial aneurysms, especially those of the cavernous segment of the internal carotid artery (ICA), can present with cranial nerve palsies. Few studies exist reporting the outcomes of cranial neuropathies following...

慢性期内頚動脈完全閉塞に対する脳血管内治療

EC-IC bypass based on the inclusion criteria of Japanese EC-IC Bypass Trial (JET study) is recommended for chronic total occlusion (CTO) of the internal carotid artery (ICA). But patients who do not meet the inclusion criteria of the JET study are also entitled to the best possible medical treatment. Recently several authors have reported the successful endovascular recanalization of CTO of the ICA. We report 10 cases of symptomatic CTO of the ICA that did not meet the inclusion criteria of the JET study that were treated by endovascular recanalization. Cerebral angiogram showed complete occlusion of the ICA and opacification of the cavernous segment of ICA or the more proximal portion of the ICA via collateral channels. Xenon CT (Xe-CT) showed hemodynamic compromise in all cases. The endovascular procedure was performed by proximal balloon protection of the common carotid arery and the external carotid artery via transfemoral route under local anesthesia. The occlusion of the ICA was recanalized successfully in all cases. Carotid artery stenting (CAS) was performed in eight cases identified as occlusion at the cervical ICA, and percutaneous transluminal angioplasty (PTA) with stenting using coronary stents was performed in two cases identified as occlusion at the cavernous or petrous ICA. Neither new ischemic symptoms nor hyperperfusion syndrome appeared after treatment. Endovascular recanalization of symptomatic CTO of the ICA can be considered as an alternative treatment for patients who do not meet the inclusion criteria of the JET study.

Treatment and experience of traumatic carotid artery injury with massive epistaxis

A retrospective analysis was made on 5 cases who had the traumatic carotid artery injury with massive epistaxis (from September 2007 to June 2011). All of them were finally diagnosed by digital substraction angiography (DSA). Among them, 2 cases of traumatic pesudoaneurysm from internal maxillary artery were embolized with polyvinyl alcohol particles and gelatin sponge. One case was carotid-cavernous fistula (CCF) with traumatic pesudoaneurysm located in the sphenoid sinus. This patient's internal carotid artery (ICA) and fistula was blocked with balloon, and then ICA was clipped proximal to the posterior communicating artery. One case with injuried ICA was treated with blocking by balloon. The pesudoaneurysm located in ICA cavernous segment of one case was embolized with coil and liquid glue. No recurrence was found after successful surgeries. Patients with massive epistaxis or recurrent epistaxis after craniofacial trauma should undergo CT angiography (CTA) or DSA examination so as to get proper diagnosis and treatment as early as possible.

Treatment of Intracranial Aneurysms Using Flow-Diverting Silk Stents (BALT): A Single Centre Experience

The Silk stent (Balt, Montmorency, France) is a retractable device designed to achieve curative reconstruction of the parent artery associated with an intracranial aneurysm. We present our initial experience with the Silk flow-diverting stent in the management and follow-up of 25 patients presenting with intracranial aneurysms.Twenty-five patients (age range, 34-81 years; 24 female) were treated with the Silk flow-diverting device. Aneurysms ranged in size from small (5), large (10) and giant (10) and included wide-necked aneurysms, multiple, nonsaccular, and recurrent intracranial aneurysms. Nine aneurysms were treated for headache, 14 for mass effect. None presented with haemorrhage. All patients were pretreated with dual antiplatelet medications for at least 72 hours before surgery and continued taking both agents for at least three months after treatment. A total of 25 Silk stents were used. Control MR angiography and/or CT angiography was typically performed prior to discharge and at one, three, six and 12 months post treatment. A follow-up digital subtraction angiogram was performed between six and 19 months post treatment.Complete angiographic occlusion or subtotal occlusion was achieved in 15 patients in a time frame from three days to 12 months. Three deaths and one major complication were encountered during the study period. Two patients, all with cavernous giant aneurysms, experienced transient exacerbations of preexisting cranial neuropathies and headache after the Silk treatment. Both were treated with corticosteroids, and symptoms resolved completely within a month.In our experience the Silk stent has proven to be a valuable tool in the endovascular treatment of intracranial giant partially thrombosed aneurysms and aneurysms of the internal carotid artery cavernous segment presenting with mass effect. The time of complete occlusion of the aneurysms and the risk of the bleeding is currently not predictable.

CT angiography diagnosis on the rupture of traumatic pseudoaneurysms of the cavernous of the internal carotid artery into the sphenoid sinus

Objective To investigate diagnostic value of CTA for traumatic pseudoaneurysms (TPA) in the cavernous segment of the internal carotid artery (ICA) when they rupture into the sphenoid sinus. Methods CTA of 7 patients with TPA in the cavernous segments of ICA verified by DSA were retrospectively analyzed. All the patients were performed CTA scanning. The post-processing techniques included VR,MIP,MPR, and CPR. Results All the CTA images of 7 patients showed irregular mass in the sphenoid sinus with obviously enhancement in the same phase to ICA, which communicating with ICA in wide base. The peripheral area of the mass showed no enhancement. The size varied from 3 mm × 2 mm × 1 mm to 33 mm × 30 mm × 27 mm. The adjacent lateral wall of sphenoid sinus showed fractures in all cases. TPA located at anterior-knee segments of cavernous ICA in 6 cases, and cavernous free segment in 1 case. All the disruptions were found at medial or anterior medial wall of ICA. Conclusions Cranial CTA is the effective non-invasive method for diagnosing TPA in the cavernous segment of ICA when they rupture into sphenoid sinus. Combined using of VR, MIP, MPR, and CPR can delineate the location and size of the sphenoid wall fracture and the ICA rupture, which help to clarify the anatomical relationship between them. Key words: Aneurysm, false; Carotid artery diseases; Tomography,X-ray computed; Angiography; Sphenoid sinus

Giant serpentine internal carotid artery aneurysm: endovascular parent artery occlusion. A pediatric case report.

We report on a case of a 14-year-old boy with a giant serpentine aneurysm of the left internal carotid artery cavernous segment with symptoms of acute mass-effect cranial nerve dysfunction. After a balloon occlusion test of the collateral circulation, the patient underwent parent artery occlusion with platinum Guglielmi detachable coils and fibered coils. An optimal angiographic result and successful clinical outcome were achieved with resolution of IIIrd, IVth and VIth cranial nerve ischemic symptoms. CT angiography and 3D-XRA rotational angiography reconstructions gave sufficient inclusion information on the giant serpentine aneurysm angioarchitechture.