Objective: To explore the diagnosis and clinical features of internal carotid artery aneurysm in the skull base. Methods: The data of 15 patients with internal carotid aneurysms in the skull base diagnosed and treated by digital subtraction angiography (DSA) or CT angiography (CTA) in the Provincial Hospital Affiliated to Shandong First Medical University from 1995 to 2017 were collected and analyzed. Among the 15 patients, 12 were males, and 3 were females, aging from 17 to 67 years old, with a median age of 44 years. Thirteen patients were diagnosed by DSA; the other two patients were diagnosed by CTA. Thirteen patients were diagnosed with pseudoaneurysm with the first symptom of epistaxis, in which eight patients underwent head trauma and 5 underwent radiotherapy of skull base tumor. The other two patients were diagnosed with true aneurysm presented headache and cranial nerve disorder. All patients were followed up for 2 to 12 years after treatment to see whether they were cured and survived. Results: Among the eight patients with a history of trauma, five patients were cured by embolization, two patients without embolization died of massive epistaxis, one patient died of progressive cerebral infarction after embolization. Among the five patients with radiotherapy of skull base tumor, one patient died of cerebral infarction after embolization, two patients died out of the hospital due to the recurrence of the primary tumor and intracranial invasion, one patient recovered well after embolization and surgical operation, one patient gave up treatment and died of massive hemorrhage out of hospital. In the other two patients with symptom of headache, one received embolization treatment outside the hospital after receiving mistake operation, and another one gave up treatment and died due to personal reasons. In total, four patients died in hospital, four died out of the hospital, and seven patients survived. Conclusions: Internal carotid artery aneurysm is a high-risk disease of anterior and middle skull base. For patients with epistaxis with a history of trauma and radiotherapy or patients with headaches and cranial nerve disorders, the possibility of the internal carotid artery aneurysm should be considered, in which DSA or CTA examination is essentially required for ensured diagnosis and disease evaluation.. The correct diagnosis and treatment by the otolaryngologist are crucial to the prognosis of the patient.
Adolescent ; Adult ; Aged ; Carotid Artery, Internal/diagnostic imaging* ; Female ; Humans ; Intracranial Aneurysm/therapy* ; Male ; Middle Aged ; Neoplasm Recurrence, Local ; Retrospective Studies ; Skull Base/diagnostic imaging* ; Young Adult

The traditional classification, diagnosis, and treatment of intracranial aneurysms are based on the characteristics of their vascular lumen. However, in the past few years, some advances in MRI technology with high-resolution imaging can assess the pathology of intracranial vascular walls. Compared with traditional methods of computed tomography angiography, magnetic resonance angiograhpy, and digital subtraction angiography, high resolution magnetic resonance imaging technology can help us to newly understand the disease by directly evaluating the characteristics of vascular wall, such as aneurysm wall thickness, inflammation, enhancement, permeability and hemodynamics. At present, high-resolution magnetic resonance imaging is increasingly used in clinic to assess the rupture risk of intracranial aneurysms, which is of great significance for guiding the diagnosis and treatment of intracranial aneurysms.
Aneurysm, Ruptured/diagnostic imaging* ; Cerebral Angiography ; Humans ; Intracranial Aneurysm/diagnostic imaging* ; Magnetic Resonance Angiography ; Magnetic Resonance Imaging ; Risk Assessment ; Technology

Adult ; Cerebral Angiography ; Female ; Humans ; Intracranial Aneurysm ; complications ; diagnostic imaging ; Lupus Erythematosus, Systemic ; complications ; diagnostic imaging ; Subarachnoid Hemorrhage ; diagnosis ; diagnostic imaging ; etiology ; Young Adult

Adult ; Aneurysm, Ruptured ; diagnostic imaging ; surgery ; Computed Tomography Angiography ; Embolization, Therapeutic ; methods ; Endovascular Procedures ; methods ; Female ; Humans ; Intracranial Aneurysm ; diagnostic imaging ; surgery

PURPOSE: To investigate the clinical and morphological characteristics in relation to risk of bifurcation intracranial aneurysm rupture. MATERIALS AND METHODS: Data from 202 consecutive patients with 219 bifurcation aneurysms (129 ruptured and 90 unruptured) managed at the authors' facility between August 2011 and July 2014 were retrospectively reviewed. Based on their clinical records and CT angiographic findings, the ability of risk factors to predict aneurysm rupture was assessed using statistical methods. RESULTS: Age, hypertension, diabetes mellitus, and cerebral atherosclerosis were negatively correlated with aneurysm rupture. Aneurysms located in the middle cerebral artery, daughter artery ratio, lateral angle ratio (LA ratio), and neck width were negatively correlated with rupture. Aneurysms located in the anterior communicating artery, irregularity, with daughter sac, depth, width, maximum size, aspect ratio (AR), depth-to-width ratio, and bottleneck factor were significantly and positively correlated with rupture. Binary logistic regression model revealed that irregular shape [odds ratio (OR) 6.598] and AR (OR 3.507) strongly increased the risk of bifurcation aneurysm rupture, while age (OR 0.434), cerebral atherosclerosis (OR 0.125), neck width (OR 0.771), and LA ratio (OR 0.267) were negatively correlated with rupture (p<0.05). Receiver operating characteristic analysis revealed the threshold values of AR and LA ratio to be 1.18 and 1.50, respectively. CONCLUSION: Age (≥60 yr), cerebral atherosclerosis, and aneurysms with a larger neck width and larger LA ratio are protective factors against bifurcation aneurysm rupture. An aneurysm with an irregular shape and an increased AR reflect the greater likelihood of a rupture.
Adult ; Age Factors ; Aged ; Aged, 80 and over ; Aneurysm, Ruptured/*diagnostic imaging ; Cerebral Angiography/*methods ; *Computed Tomography Angiography ; Developmental Disabilities ; Diabetic Angiopathies/complications ; Female ; Humans ; Hypertension/complications ; Intracranial Aneurysm/*diagnostic imaging ; Intracranial Arteriosclerosis/complications ; Logistic Models ; Male ; Middle Aged ; Middle Cerebral Artery/diagnostic imaging ; Odds Ratio ; Protective Factors ; ROC Curve ; Retrospective Studies ; Risk Factors

BACKGROUNDThe endovascular strategy of the huge dissecting aneurysms involving the basilar artery (BA) is controversial and challenging. This study was to investigate the clinical and angiographic outcomes of the treatment of the huge dissecting aneurysms involving the BA by the internal trapping (IT) technique.

METHODSWe retrospectively studied 15 patients with the huge dissecting aneurysms involving the BA treated by the IT technique between September 2005 and September 2014 in Department of Interventional Neuroradiology of Beijing Tiantan Hospital. Clinical and angiographic data were reviewed and evaluated.

RESULTSAll patients were treated by the IT technique. That meant the dissecting artery and aneurysm segments were completed occlusion. After the procedure, the angiography demonstrated that all the dissecting artery and aneurysm segments were completed occlusion. Follow-up angiography was performed at 3-6 months or 12-18 months after the endovascular treatment (median 8 months), 14 patients had a good recovery. Re-canalization occurred in one patient whose aneurysm involved in bilateral vertebral arteries and the two third of the middle-lower BA. After the second treatment, the patient died by the ventricular tachycardia.

CONCLUSIONSThe IT technique is a technically feasible and safe alternative for the treatment of BA dissecting aneurysms, but it is not necessarily the safest or most definitive treatment modality. The ideal treatment of the huge dissecting aneurysms involving the BA remains debatable and must be investigated on a case-by-case basis.

Adolescent ; Adult ; Aneurysm, Dissecting ; diagnostic imaging ; therapy ; Basilar Artery ; diagnostic imaging ; Female ; Humans ; Intracranial Aneurysm ; diagnostic imaging ; therapy ; Male ; Middle Aged ; Radiography ; Retrospective Studies ; Treatment Outcome ; Young Adult

The formation mechanisms of rare intracranial aneurysms are various, which lead to various kinds of treatment methods. The present article summarized the pathogenesis, pathologic changes in vascular walls and imaging features of rare intracranial aneurysms including segmental ectasia, aneurysms with dissection, aneurysms with intramural hemorrhage, mycotic aneurysms, aneurysms related to HIV, neoplastic aneurysms and traumatic aneurysms through literature review.
Diagnostic Imaging ; Dilatation, Pathologic ; Humans ; Intracranial Aneurysm ; diagnosis ; pathology ; therapy

To comparatively study the diagnostic value of dual resource computed tomography angiography (DSCTA) and 3.0T magnetic resonance angiography (MRA) for intracranial aneurysm, we analyzed retrospectively radiographic data of DSCTA, 3.0T MRI and three dimensional digital subtraction angiography (3D DSA ) in cases suspected intracranial aneurysms during Jan. 2010 to Dec. 2011. With 3D DSA as "gold standard", the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of DSCTA and 3.0T MRA in diagnostic of intracranial aneurysms were analyzed, and the accuracy of both methods on evaluation of aneurysms size was compared as well. Totally fifty-three suspected cases were included, and forty-two intracranial aneurysms in thirty-five cases were identified by 3D DSA. For DSCTA, 37 aneurysms were detected in 32 patients, and 3 patients and 5 aneurysms were missed in all patients. However, for 3.0 T MRA, 33 aneurysms were detected in 33 patients, 5 patients and 8 aneurysms were missed, and 3 patients who did not have aneurysms were misdiagnosed as ones with intracranial aneurysms. The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of DSCTA and 3.0T MRA were 91.4% vs. 85.7%, 100% vs. 83.3%, 100% vs. 90.9%, 85.7% vs. 75.0% and 94.3% vs. 84.9%,respectively. There was no significant difference in evaluation of aneurysms size between using the two methods. Data suggested that both DSCTA and 3.0T MRA had high accuracy for detection intracranial aneurysms and evaluation of aneurysms size, but as for detection of microaneurysms, DSCTA was superior to 3.0T MRA.
Adult ; Aged ; Aged, 80 and over ; Cerebral Angiography ; methods ; Female ; Humans ; Intracranial Aneurysm ; diagnosis ; diagnostic imaging ; Magnetic Resonance Angiography ; methods ; Male ; Middle Aged ; Tomography, X-Ray Computed ; methods

OBJECTIVETo explore the imaging features, diagnosis and treatment strategies of intracranial lageniform aneurysms.

METHODSThe clinical characteristics and therapeutic outcomes of 6 patients with intracranial lageniform aneurysms were retrospectively analyzed.

RESULTSAll the 6 aneurysms, including 5 anterior communicating artery aneurysms and 1 middle cerebral artery (MCA) aneurysm, were diagnosed by CT, DSA and (or) MRA. Pretreatment CT revealed subarachnoid hemorrhage and intracranial hematoma surrounding the ruptured aneurysm. Three dimensional DSA showed that all the lageniform aneurysms contained two parts, the larger false aneurysm and the smaller true aneurysms. All the 5 Acom aneurysms were coiled and the MCA aneurysm was clipped. Two patients with coiling developed serious brain edema, and acute decompressive craniectomy was performed to 1 of them. Pathological examination of the surgical specimens confirmed that pseudoaneurysm formed the larger part of the lageniform aneurysm. One patient died of brain hernia, and the other 5 patients were discharged with good GOS. All the patients showed stable neurological status during the 3-month follow-up.

CONCLUSIONLageniform aneurysm is a complex aneurysm consisting in larger part of false aneurysm and in smaller part of true aneurysm, and early intervention with individualized surgeries is recommended.

Adult ; Aneurysm, False ; diagnostic imaging ; pathology ; surgery ; Female ; Humans ; Intracranial Aneurysm ; diagnostic imaging ; pathology ; surgery ; Male ; Middle Aged ; Radiography ; Retrospective Studies

BACKGROUNDUnclippable fusiform basilar trunk aneurysm is a formidable condition for surgical treatment. The aim of this study was to establish a computational model and to investigate the hemodynamic characteristics in a fusiform basilar trunk aneurysm.

METHODSThe three-dimensional digital model of a fusiform basilar trunk aneurysm was constructed using MIMICS, ANSYS and CFX software. Different hemodynamic modalities and border conditions were assigned to the model. Thirty points were selected randomly on the wall and within the aneurysm. Wall total pressure (WTP), wall shear stress (WSS), and blood flow velocity of each point were calculated and hemodynamic status was compared between different modalities.

RESULTSThe quantitative average values of the 30 points on the wall and within the aneurysm were obtained by computational calculation point by point. The velocity and WSS in modalities A and B were different from those of the remaining 5 modalities; and the WTP in modalities A, E and F were higher than those of the remaining 4 modalities.

CONCLUSIONSThe digital model of a fusiform basilar artery aneurysm is feasible and reliable. This model could provide some important information to clinical treatment options.

Adult ; Computational Biology ; Hemodynamics ; physiology ; Humans ; Intracranial Aneurysm ; diagnostic imaging ; pathology ; physiopathology ; Male ; Radiography