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Spinal intramedullary arteriovenous malformations (AVMs) can present with spinal hemorrhage. However, some of them occasionally can be the cause of angiographically negative intracranial subarachnoid hemorrhage, thus requiring a more comprehensive diagnostic approach to detect the possible source of bleeding. Nidal or arterial feeder aneurysms are widely considered high-risk rupture portions of the spinal AVM and recognized as a major cause of bleeding. Due to the tight eloquent confines within the thecal sac and the higher annual rupture risk after the initial bleeding, recurrent hemorrhage may have catastrophic outcomes. Hence the goal of management is to obliterate the spinal AVM preserving neurologic function and preventing future hemorrhagic events. Unlike cerebral AVMs, partial treatment of spinal intramedullary AVMs has been documented to be effective to improve the patients' prognosis dramatically. Microsurgical resection with or without adjuvant embolization has been considered the mainstay treatment for symptomatic glomus spinal intramedullary AVMs. The case of a 25-year-old man with acute cerebral subarachnoid hemorrhage caused by intranidal aneurysm rupture of cervical glomus-type AVM is presented here. The patient was surgically treated by C3-C4 laminectomy and AVM excision by pial resection technique. Thereby, the pial resection technique helps in providing subtotal AVM nidus resection, minimizing parenchymal dissection but effectively devascularizing glomus AVMs with satisfactory long-term results. [ABSTRACT FROM AUTHOR]

Arteriovenous fistula and spinal aneurysms like other vascular malformations can mimic radiculopathy and low back pain. Precise imaging work combined with a hybrid endovascular‐microsurgical approach is the key element for the best clinical outcome. [ABSTRACT FROM AUTHOR]

Abstract Arteriovenous fistula and spinal aneurysms like other vascular malformations can mimic radiculopathy and low back pain. Precise imaging work combined with a hybrid endovascular‐microsurgical approach is the key element for the best clinical outcome.

Background: Spinal arteriovenous malformations (AVMs) are rare vascular lesions presenting either with subtle progressive myelopathy or acute intramedullary/subarachnoid hemorrhage with associated neurological deficits. Far more uncommonly, AVMs are associated with intra-nidal aneurysms, which provide a further challenge in their management. Nevertheless, if untreated, these lesions lead to severe disability with a poor percentage of neurological recovery. Due to the lack of general guidelines, a neurosurgical and endovascular multidisciplinary approach is mandatory to achieve the best outcome in the management of such conditions. Case description: We provide a case of a 12-year-old girl presenting with a history of progressive lower limbs hyposthenia and sphincter dysfunction, presenting with acute excruciating back pain. Radiological assessments revealed a thoracic anterior intramedullary AVM associated with intranidal aneurysm, determining spinal cord compression. Discussion and conclusions: After a multidisciplinary evaluation, patient underwent a microsurgical resection of the lesion, with exclusion of the lesion from the spinal circulation and spinal cord decompression. On three-months neuroradiological follow-up, complete refilling of the spinal aneurysm was detected, and patient underwent a new microsurgical approach. Definitive exclusion of the vascular lesion was then achieved. Critical discussion of the choice of treatment along with a review of the pertinent literature is provided.

Subarachnoid hemorrhage (SAH) due to a solitary spinal aneurysm is extremely rare. Early diagnosis of spinal SAH is challenging, particularly when the spinal cord has not been compressed. We report a case of a 45-year-old male who presented with sudden onset of abdominal pain, followed by severe headache, vomiting, and generalized seizure. Three days after admission to the hospital, he developed progressive paraparesis. Magnetic resonance imaging (MRI) revealed spinal SAH with hematoma resulting in cord compression at the level of T9. Diagnostic spinal angiography identified a ruptured aneurysm of a radiculomedullary artery. In conclusion, rupture of a spinal aneurysm should be considered a possible cause of SAH in appropriate clinical settings, and clinicians must be aware of the possibility of cord compression.

Aneurysms of spinal arteries not associated with any known predisposing condition are referred to as isolated spinal aneurysms (SAs). In our series, an SA was found in 2 patients during the postpartum period. The goal of this study is to determine whether an occurrence of an SA may be related to puerperium. In a retrospective analysis of our consecutive series of 10 cases of SAs from 2008 to 2020, we identified 2 cases of SAs during puerperium. Patients' charts and imaging were reviewed, for potential predisposing factors. In both cases, angiography showed fusiform aneurysms of the anterior SA with concomitant bilateral vertebral artery (VA) dissections. Serum vasculitis and inflammatory panel and genetic testing for collagen disorders were negative in both cases. Review of the literature showed that pregnancy is associated with an increased risk of arterial dissections in various locations and supports the hypothesis that hemodynamic and hormonal changes may play a role in the formation of SAs. Pregnancy and peripartum state may be a distinct cause of the formation of SAs, possibly as a result of increased hemodynamic stress and hormonal changes that may alter the arterial wall. It would be appropriate to add pregnancy as a subgroup in the classification of SAs. In our series, both cases were associated with bilateral VA dissections; it is possible that the bilateral VA stenosis may have contributed to the formation of the SAs. It is important to recognize this possibility when considering the occlusion of a dissected VA. [ABSTRACT FROM AUTHOR]

Purpose: Spinal aneurysms are rare vascular malformations, commonly associated with spinal AVMs. AVM-associated spinal aneurysms are burdened by significant morbidity. The purpose of our study is to evaluate the best treatment strategy for these uncommon vascular lesions and to report an illustrative case. Methods: We reviewed clinical and radiological data of a patient surgically treated at our institution for a spinal AVM with an associated prenidal aneurysm. According to PRISMA guidelines, a systematic literature review has been performed in order to discuss the best management AVM-associated prenidal aneurysms. Results: In the reported case, the aneurysm showed spontaneous regression at follow-up after surgical removal of the AVM. Only 6 articles reported management of spinal prenidal AVM-associated aneurysms. Basing on our experience and data from literature, surgical treatment of the aneurysm may be indicated along with the resection of the AVM if the aneurysm is close to the nidus. Conversely, if the aneurysm is far away from the nidus or in an unfavorable position, resection of the nidus only may lead to aneurysm regression as in the reported case. Conclusions: The treatment strategy for AVM-associated spinal aneurysms should be tailored on the single patient. In presence of large aneurysms that cause mass-effect symptoms, when rupture of the aneurysm is suspected or when treatment of the AVM is not proposable, direct treatment of the aneurysm should be considered. Otherwise, when complete resection of the nidus is performed, the eventually associated unruptured aneurysms located in challenging positions can be safely managed conservatively. [ABSTRACT FROM AUTHOR]

Spinal aneurysms (SA) are rare neurovascular pathologies with an unclear natural history and management strategy. We review the clinical and radiologic manifestations, management, and outcome of patients who presented with spinal subarachnoid hemorrhage (SAH) secondary to ruptured spinal aneurysms over a 10-year period. We provide a literature review about this condition and its management. All patients diagnosed with nontraumatic spinal SAH were collected from a single-center prospectively maintained database of patients with SAH between January 2010 and January 2020. Patients diagnosed with spinal aneurysms were reviewed. For each patient, demographic data, clinical presentation, imaging findings, management strategies, and outcomes are reviewed and discussed. Between January 2010 and January 2020, ten patients were diagnosed with nontraumatic spinal SAH (3 patients presented with isolated spinal SAH and 7 patients with concomitant spinal and posterior fossa SAH). Among those, 4 patients were found to have a spinal aneurysm as the cause of SAH. The aneurysms were located in the cervical regions in 3 patients (75%) and at the thoracic level in 1 patient. Two aneurysms (50%) involved the anterior spinal artery, and 2 aneurysms (50%) involved a radiculomedullary artery. One aneurysm was a flow-related aneurysm of the anterior spinal artery in the setting of bilateral vertebral artery occlusion and was treated by surgical clipping with good outcome. Three aneurysms were idiopathic pseudoaneurysms with a negative diagnostic evaluation for secondary causes. These pseudoaneurysms were treated conservatively; 2 patients did well and 1 patient passed away from severe intracranial vasospasm. Two aneurysms resolved on diagnostic angiogram, and 1 aneurysm was absent on initial angiogram and appeared on follow-up diagnostic imaging 3 months later. Spinal aneurysms are rare neurovascular pathologies that should be considered in the setting of spinal and/or posterior fossa subarachnoid hemorrhage. Conservative treatment may be a potential safe alternative to interventional treatment. Before the initiation of surgical or endovascular treatment, spinal angiography should be repeated because of the potential for spontaneous resolution. [ABSTRACT FROM AUTHOR]

Cervical pial arteriovenous malformation (AVM) is an extremely rare condition that can present with progressive myelopathy or acute hemorrhage (subarachnoid or intramedullary). The classification process is still a topic of discussion, given the limited number of cases described, as well as correct therapeutic management. Here, we present a case of a young female with anterior cervical pial AVM associated with spinal aneurysm. A 31-year-old female in the fifth month of pregnancy presented to the emergency department for tetraparesis, sphincter disturbances, and burning dysesthesia. Through magnetic resonance angiography, a cervical pial arteriovenous malformation (AVM) with a spinal aneurysm has been diagnosed. After a multidisciplinary consult, a neurosurgical approach has been proposed to minimize the hemorrhagic risk. A laminectomy C2-C4 level was performed, followed by identification of the AVM on the anterior-lateral left-sided surface of the spinal cord. The lesion was associated with a thrombosed aneurysm at the C2 level. Using neurophysiologic monitoring, we performed a temporary clipping of afferent vessels to the AVM. The thrombosed aneurysm was removed. Indocyanine green fluorescein and intraoperative Doppler confirmed complete resolution of AVM. The postoperative course has been regular with no complications recorded. Surgical procedure with perioperative neuromonitoring is an effective way to treat anterior cervical pial AVM associated with spinal aneurysm. A multidisciplinary approach is always suggested. [ABSTRACT FROM AUTHOR]

Subarachnoid hemorrhage (SAH) due to a solitary spinal aneurysm is extremely rare. Early diagnosis of spinal SAH is challenging, particularly when the spinal cord has not been compressed. We report a case of a 45-year-old male who presented with sudden onset of abdominal pain, followed by severe headache, vomiting, and generalized seizure. Three days after admission to the hospital, he developed progressive paraparesis. Magnetic resonance imaging (MRI) revealed spinal SAH with hematoma resulting in cord compression at the level of T9. Diagnostic spinal angiography identified a ruptured aneurysm of a radiculomedullary artery. In conclusion, rupture of a spinal aneurysm should be considered a possible cause of SAH in appropriate clinical settings, and clinicians must be aware of the possibility of cord compression. [ABSTRACT FROM AUTHOR]

Objective: Isolated spinal aneurysms (ISAs) are rare causes of subarachnoid hemorrhage (SAH), which encompass a highly heterogeneous group of clinical entities with multifarious pathogeneses, clinical characteristics, and treatment strategies. Therefore, knowledge about the ISAs remains inadequate. In this study, the authors present a comprehensive analysis of clinical data associated with ISAs at their institutions to enhance the understanding of this disease., Methods: Patients with ISAs confirmed by spinal angiography or surgery at the authors' institutions between 2015 and 2022 were included. Data regarding clinical presentation, lesion location, aneurysm morphology, comorbidities, treatment results, and clinical outcomes were reviewed., Results: Seven patients with ISAs were included in the study. Among them, 4 patients (57.1%) experienced severe headache, and 3 patients (42.9%) reported sudden-onset back pain. Additionally, lower-extremity weakness and urinary retention were observed in 2 of these patients (28.6%). Four of the aneurysms exhibited fusiform morphology, whereas the remaining were saccular. All saccular aneurysms in this series were attributed to hemodynamic factors. Conservative treatment was administered to 3 patients, 2 of whom underwent follow-up digital subtraction angiography, which showed spontaneous occlusion of both aneurysms. Four patients ultimately underwent invasive treatments, including 2 who underwent microsurgery and 2 who received endovascular embolization. One patient died of recurrent SAH, while the remaining 6 patients had a favorable prognosis at the latest follow-up assessment., Conclusions: The morphology of aneurysms may be associated with their etiology. Saccular ISAs are usually caused by pressure due to abnormally increased blood flow, whereas fusiform lesions may be more likely to be secondary to vessel wall damage. The authors found that a saccular spinal aneurysm in young patients with a significant dilated parent artery may be a vestige of spinal cord arteriovenous shunts. ISAs can be managed by surgical, endovascular, or conservative procedures, and the clinical outcome is generally favorable. However, the heterogeneous nature of the disease necessitates personalized treatment decision-making based on specific clinical features of each patient.

Purpose: To report the case of a pediatric patient with intramedullary spinal aneurysm.Methods: A 9-year-old boy presented with low back pain and subsequent gait disturbance. He had no history of trauma. After admission, MRI revealed an intramedullary spinal cord mass lesion surrounded by hemorrhage at the cervical-thoracic junction. Initial treatment was started with intravenous methylprednisolone and bed rest. Neurological deficit disappeared under careful observation for a few months. Surgical intervention was applied for diagnosis and resection of the mass lesion to prevent recurrent hemorrhage.Results: Intraoperative ultrasound sonography helped to diagnose the lesion as a spinal cord aneurysm, prior to midline myelotomy. Monitoring of transcranial muscle evoked potentials helped to avoid spinal cord damage during surgery. There has been no evidence of spinal aneurysm on MRI for 3 years after surgery and no neurological deterioration.Conclusion: To our knowledge, this is a first report of an intramedullary spinal cord aneurysm at the cervical-thoracic junction in a pediatric patient. Careful observation after initial symptoms followed by surgical intervention was favorable in this case. [ABSTRACT FROM AUTHOR]

Subarachnoid hemorrhage due to a solitary spinal aneurysm is extremely rare and diagnosis and treatment are challenging. We report a rare case of a ruptured radiculomedullary artery aneurysm in a patient with Behçet disease. A 49-year-old man presented with severe lower abdominal and leg pain. Magnetic resonance imaging was performed and an enhanced intradural-extramedullary lesion at the T12 spinal level with subarachnoid hemorrhage was identified. Diagnostic spinal angiography was performed to evaluate the vascular lesion and a radiculomedullary artery aneurysm at the T12 level was identified. We performed surgical resection of the aneurysm and a good neurological outcome was obtained. [ABSTRACT FROM AUTHOR]

Study Design: A case report.Objective: To report the successful use of electrophysiological monitoring in the surgical resection of a ruptured spinal artery (SA) aneurysm to locate the lesion, and to predict ischemic complications.Summary Of Background Data: Isolated aneurysm of the posterior SA is an extremely rare event without established treatment and diagnosis procedures. Reports describing the surgical intervention of aneurysm of the posterior SA using electrophysiological monitoring are scant.Methods: We performed the surgical resection of a dissected posterior SA aneurysm in an older patient who presented with spinal subarachnoid hemorrhage using intraoperative electrophysiological monitoring.Results: Intraoperatively, motor evoked potentials decreased over 50% when a distal site of the lesion was clipped, indicating that site was the posterior SA. This lead to further investigation of the vascular anatomy around the lesion, which revealed the descending part of the posterior SA buried deeply in a thick thrombus. Clipping and resection were successful, and ischemia of the posterior SA was avoided. The postoperative clinical course was good, and there was no recurrence or long-term squeal.Conclusion: Electrophysiological monitoring might be useful when intraoperative anatomical findings of the hemodynamic structure are inadequate. Moreover, in our case, intraoperative changes in motor evoked potentials indicated the risk to occlude one of posterior SAs, although it is said that posterior circulation of spinal cord has ischemic tolerance. [ABSTRACT FROM AUTHOR]

Background: Approximately 1 % of cases of intracranial subarachnoid hemorrhage (SAH) are caused by spinal vascular pathologies. Among them, isolated spinal artery aneurysms are uncommon and a limited number of cases have been reported in the literature. Methods: This is a report of two cases and review of the literature. Results: Both patients presented with an atypical intracranial SAH and were also found to have spinal SAH caused by a ruptured posterior spinal aneurysm. Conclusion: Isolated spinal artery aneurysms represent a rare cause of intracranial SAH. Symptoms such as back pain and lower-extremity weakness can be clues to the adequate diagnosis. Surgical or endovascular treatment should be pursued in all patients, as the risk of rebleeding is non-negligible. [ABSTRACT FROM AUTHOR]

Isolated spinal artery aneurysms are exceedingly rare vascular lesions thought to be related to dissection of the arterial wall. We describe two cases presenting with spinal subarachnoid haemorrhage that underwent conservative management. In the first patient the radiculomedullary branch involved was feeding the anterior spinal artery at the level of D3 and thus, neither endovascular nor surgical approach was employed. Control angiography was performed at seven days and at three months, demonstrating complete resolution of the lesion. In our second case, neither the anterior spinal artery or the artery of Adamkiewicz could be identified during angiography, thus endovascular management was deemed contraindicated. Magnetic resonance imaging showed a stable lesion in the second patient. No rebleeding or other complications were seen. In comparison to intracranial aneurysms, spinal artery aneurysms tend to display a fusiform appearance and lack a clear neck in relation to the likely dissecting nature of the lesions. Due to the small number of cases reported, the natural history of these lesions is not well known making it difficult to establish the optimal treatment approach. Various management strategies may be supported, including surgical and endovascular treatment, but It would seem that a wait and see approach is also viable, with control angiogram and treatment decisions based on the evolution of the lesion. [ABSTRACT FROM AUTHOR]

Little is known on the natural history of ruptured isolated aneurysms of the posterior spinal artery (PSA). To date, only a few of such cases have been described in the literature. This paper aims to assess the most appropriate management strategy, based on the available literature and two new cases. In one of these, treatment was postponed until day 33, when angiography showed slight growth of the aneurysm. In the other, conservative treatment, requested by the patient, was successful. From these data, we conclude that treatment strategies for ruptured PSA aneurysms may vary. Aside from the recommendation by others to perform prompt surgical treatment, we suggest an alternative clinical paradigm allowing for the evaluation of the early clinical course. This may preclude the unnecessary treatment of spontaneously regressing lesions and still allows for appropriate treatment for persistent lesions. [ABSTRACT FROM AUTHOR]

Background: Angiographic vasculitis affecting the spine has been rarely described. The use of immunosuppression as a primary treatment and a review of the literature is presented. Methods: Case report. Results: A 61-year-old female presented with sudden onset back pain and headache. The patient was found to have acute spinal epidural hemorrhage and subsequent work-up demonstrated angiographic spinal vasculitis. Immunosuppression with cyclophosphamide resulted in clinical and radiographic improvement. Conclusions: Immunomodulating therapy should be considered in the management of select patients with spinal vasculitis which may lead to improved clinical outcome and potentially disease resolution. [ABSTRACT FROM AUTHOR]

Isolated posterior spinal artery aneurysms are rare vascular lesions. We describe the case of a 43-year-old man presenting with spinal subarachnoid hemorrhage after a minor trauma who was found to have a dissecting aneurysm of a posterior spinal artery originating from the right T4 level. Endovascular treatment was not contemplated because of the small size of the feeding artery, whereas surgical resection was deemed more appropriate because of the posterolateral perimedullary location that was well appreciated on CT angiography. After surgical resection of the aneurysm the patient had a complete neurological recovery. In comparison to anterior spinal artery aneurysms whose pathogenesis is diverse, posterior spinal aneurysms are most often secondary to a dissection and represent false or spurious aneurysms. Although the definite diagnosis still requires spinal angiography, MRI and CT may better delineate the relationship of the aneurysm to the spinal cord in order to determine the best treatment method. Prompt treatment is recommended as they have high rebleeding and mortality rates. [ABSTRACT FROM AUTHOR]

BACKGROUNDSpinal cord arteriovenous malformation (AVM) associated with spinal aneurysm is not particularly rare, but cases presenting with hematomyelia are relatively rare compared to those with subarachnoid hemorrhage (SAH). We report a rare case of successfully treated spinal AVM associated with ruptured aneurysm presenting with hematomyelia.CASE DESCRIPTIONA 52-year-old male was admitted to our hospital with sudden onset of tetraplegia, respiratory disturbance, and superficial sensory disturbance. Computed tomography revealed hematomyelia at the level of C3–4. Gadolinium-enhanced magnetic resonance imaging showed small, enhanced lesions. Angiography revealed an intradural perimedullary arteriovenous malformation associated with two aneurysms on the feeding arteries. Administration of high-dose methylprednisolone gradually ameliorated his symptoms. Direct surgical obliteration was performed on the 30th day after the onset. The bilateral C3 cervical radicular arteries and the nidus were coagulated. Angiography performed after surgery showed neither the aneurysms nor the nidus. He was discharged with only mild weakness in the left upper extremity and mild left hypesthesia 3 months after surgery, and was fully independent.CONCLUSIONWe report a case of hematomyelia caused by ruptured aneurysm associated with spinal arteriovenous malformation that was successfully treated with surgical obliteration. [Copyright &y& Elsevier]

We introduce a 58-year-old woman who suffered from progressive systemic scleroderma (PSS) associated with trigeminal sensory neuropathy for approximately 10 years. She then had a stroke from spinal subarachnoid hemorrhage (SSAH). Spinal digital subtraction angiography (DSA) revealed two aneurysms and smaller dilations of the afferent vessel that could also be seen by MRI. Three asymptomatic brain infarctions in different vascular regions could be revealed by CCT. The SSAH, ischemic lesions and aneurysms were probably caused by vasculitic affections induced by PSS. [ABSTRACT FROM AUTHOR]

A 40-year-old man with known definite Behçet's disease (BD) was admitted with confusional state which had started 4 days before admission with an acute headache and vomiting. Neurological examination revealed confusion, stiff neck, right facial weakness, left hemiparesis, dysartria and truncal ataxia. CSF was haemorrhagic and xanthochromic. Cranial CT scans were negative, but MRI showed a right pontine hyperintense lesion on T2-weighted images. Bilateral carotid angiograms were normal. Right vertebral angiogram showed findings consistent with a dissection at the V segment of the artery. At the level of the fifth cervical vertebra, a radiculomedullary branch of the vertebral artery with an ancurysmal dilatation in its intradural portion was notable. This case shows that, in BD, aneurysn formation can also occur in a spinal artery and spontaneous vertebral artery dissection can be seen. [ABSTRACT FROM AUTHOR]

Subarachnoid hemorrhage (SAH) or intraventricle hemorrhage (IVH) with negative cerebral digital subtraction angiography (DSA) results, which are due to non-cervical spinal arteriovenous lesions, are uncommon. In this article we presented three cases from our hospital and nineteen cases from prior published literature and discussed clinical features, possible mechanisms underlying the hemorrhage and therapeutic strategies for managing this unusual entity. Our analysis revealed that headache was the most common initial symptom. Almost 60% of patients had symptoms related to the spinal cord at admission. Intramedullary arteriovenous malformations (AVM) were the most common type of malformation, and the thoracic segment was the most common location of the non-cervical spinal arteriovenous lesions. More than half of the patients had additional aneurysms. Surgery was chosen as the primary treatment modality in this series. Therefore, we speculate that thoracolumbar spinal arteriovenous lesions are an unusual cause of intracranial SAH with negative cerebral DSA results. If non-cervical spinal AVMs were associated with DSA-negative SAH, the pattern of hemorrhage could be manifested as the blood in supratentorial cisterns, the fourth ventricle or no copious blood around the foramen magnum as well (somewhat paradoxically), it depends on the timing of detection and image evaluation. The formation and the rupture of associated aneurysms were the most likely immediate cause of the intracranial SAH. If non-cervical spinal AVMs were not associated with DSA-negative SAH and all cases were genuine cases of 'SAH-of-unknown origin', the spinal AVM could be considered as incidental finding. Magnetic resonance imaging (MRI) of the complete spinal neuraxis is recommended to either exclude or identify a spinal lesion in these patients. Catheter-based spinal angiography remains the gold standard for the diagnosis of spinal vascular diseases. The decision regarding a therapeutic strategy is based on the angioarchitecture and on the type of spinal arteriovenous lesions., (Copyright © 2019 Elsevier B.V. All rights reserved.)

Vascular disorders of the spine are more rare than cerebral vascular entities but can result in significant morbidity. These lesions frequently demonstrate distinguishing characteristics by imaging that are imperative for the radiologist to recognize to properly guide diagnosis and treatment. We review distinguishing imaging characteristics for spinal vascular malformations, spinal emergencies, and spinal vascular masses., (Copyright © 2018 Elsevier Inc. All rights reserved.)

Background: The rupture of an isolated spinal aneurysm is an exceptional occurrence. It might be responsible for a spinal subarachnoid haemorrhage (SSAH) that in rare cases can be complicated by arachnoiditis. Among the former the adhesive type is the most severe leading to the formation of a cyst and/or a syrinx., Patients and Methods: The literature review was performed via a PubMed search using the following keywords. Adhesive arachnoiditis; spinal subarachnoid haemorrhage; spinal arachnoiditis; spinal arachnoid cyst; arachnoid cyst .Thesearch yielded 24 articles. Given the fact that only a few studies had been reported on the subject, we decided to include all studies regarding adhesive arachnoiditis after SAH leading to a descriptive literature review. Furthermore, a case illustration of a 57 year old man harbouring this type of rare pathology is described., Results: Twenty-four case reports were found regarding spinal adhesive arachnoiditis (SAA) following SSAH. Posterior cerebral circulation bleeding (66.7%) most often occurred followed by spinal (9.1%) and anterior cerebral circulation (9.1%) respectively. The mean time between the haemorrhage and the SAA onset was 10 months. A higher predominance of symptomatic thoracic SAA was found. Including the present case, 80% of patients had a laminectomy, 72% had a micro adhesiolysis, and 56% a shunt placement. Cervical and upper thoracic involvement appeared to have a better outcome., Conclusion: Although most authors suggested surgical treatment, the long-term outcome remains unclear. Early stage diagnosis and management of this rare and disabling pathology may lead to a better outcome. Larger co-operative studies remain essential to obtain a better understanding of such a rare and complex disease., (Copyright © 2018 Elsevier Masson SAS. All rights reserved.)

Background: Spinal radiculomedullary artery aneurysms are extremely rare. Treatment should be tailored to clinical presentation, distal aneurysm flow, and lesion anatomical features. When a surgical occlusion is planned, it is necessary to evaluate whether intraoperative monitoring (IOM) should be considered as an indispensable tool to prevent potential spinal cord ischemia., Methods: We present a patient with symptoms and signs of spinal subarachnoid hemorrhage resulting from the rupture of a T4 anterior radiculomedullary aneurysm who underwent open surgical treatment under motor evoked potential (MEP) monitoring., Results: Due to the aneurysmal fusiform shape and preserved distal flow, the afferent left anterior radiculomedullary artery was temporarily clipped; 2 minutes after the clamping, the threshold stimulation level rose higher than 100 V, and at minute 3, MEPs amplitude became attenuated over 50%. This was considered as a warning criteria to leave the vessel occlusion. The radiculomedullary aneurysm walls were reinforced and wrapped with muscle and fibrin glue to prevent re-bleeding. The patient awoke from general anesthesia without focal neurologic deficit and made an uneventful recovery with complete resolution of her symptoms and signs., Conclusion: This paper attempts to build awareness of the possibility to cause or worsen a neurological deficit if a radiculomedullary aneurysm with preserved distal flow is clipped or embolized without an optimal IOM control. We report in detail MEP monitoring during the occlusion of a unilateral T4 segmental artery that supplies an anterior radiculomedullary artery aneurysm., Competing Interests: There are no conflicts of interest.

Isolated spinal artery aneurysms are exceedingly rare vascular lesions thought to be related to dissection of the arterial wall. We describe two cases presenting with spinal subarachnoid haemorrhage that underwent conservative management. In the first patient the radiculomedullary branch involved was feeding the anterior spinal artery at the level of D3 and thus, neither endovascular nor surgical approach was employed. Control angiography was performed at seven days and at three months, demonstrating complete resolution of the lesion. In our second case, neither the anterior spinal artery or the artery of Adamkiewicz could be identified during angiography, thus endovascular management was deemed contraindicated. Magnetic resonance imaging showed a stable lesion in the second patient. No rebleeding or other complications were seen. In comparison to intracranial aneurysms, spinal artery aneurysms tend to display a fusiform appearance and lack a clear neck in relation to the likely dissecting nature of the lesions. Due to the small number of cases reported, the natural history of these lesions is not well known making it difficult to establish the optimal treatment approach. Various management strategies may be supported, including surgical and endovascular treatment, but It would seem that a wait and see approach is also viable, with control angiogram and treatment decisions based on the evolution of the lesion.