Left Anterior Cerebral Artery Research Articles

Clinico-radiological factors associated with aphasia outcome in post stroke patients: A prospective follow up study from eastern part of India

BackgroundAphasia is a language disorder acquired secondary to brain damage. This study aims to evaluate clinical and radiological profile of patients with post stroke aphasia and factors affecting its recovery. MethodsWe conducted a prospective study of patients with first left Middle or Anterior Cerebral Artery infarct or Intracerebral Hemorrhage (ICH) with aphasia admitted within 14 days of stroke onset. Aphasia Quotient (AQ) was assessed at 2 weeks (AQ1) and 3 months (AQ2) using Western Aphasia Battery-Hindi version. Magnetic Resonance Imaging of brain with Diffusion Tensor Imaging (DTI) of bilateral Arcuate Fasciculus (AF) and Corticospinal Tract was done at admission, and stroke volume, Laterality Indices of Fractional Anisotropy (LI-FA), Mean Diffusivity (LI-MD), Radial Diffusivity (LI-RD), Axial Diffusivity (LI-AD) and Apparent Diffusion Coefficient (LI-ADC) were obtained. Results36 patients [8 ICH and 28 Acute Ischemic Stroke (AIS)] were included. AQ1 and AQ2 were significantly higher in subcortical stroke than cortical. AQ2 and increase in AQ scores (including its subscores) were significantly higher in ICH than AIS. National Institutes of Health Stroke Scale score at admission and volume of stroke had significant negative correlation with AQ1 and AQ2. Laterality Index of Fractional Anisotropy of Arcuate Fasciculus [LI-FA (AF)] had significant positive correlation with AQ2 and naming score at 3 months. Laterality Index of Mean Diffusivity of Arcuate Fasciculus [LI-MD (AF)] had significant negative correlation with AQ1, AQ2 and all subcomponents of AQ2. Significant positive correlation was seen between improvements in Modified Rankin Scale score and AQ. ConclusionThe study shows that DTI can be used to predict severity of aphasia at follow up and recovery in language and motor functions occur in parallel

Abstract TP139: Revascularization Improves Vascular Hemodynamics in Pediatric Moyamoya Patients

Introduction: Cerebrovascular reactivity (CVR) reflects the change in cerebral blood flow (CBF) in response to vasodilation. Studies have demonstrated that impaired CVR was associated with a higher risk of acute stroke in patients with intracranial vasculopathy and that bypass surgeries can reduce the risk of strokes. Moyamoya disease is a progress cerebrovascular disorder that begins during childhood. Arterial spin labeling (ASL) is a quantitative MRI technique for non-invasive CBF and CVR measurement; ASL with multiple delays can also measure arterial transit time (ATT). Here, we compare the CBF, CVR, and ATT in pediatric Moyamoya patients before and after bypass using multi-delay ASL. Hypothesis: CVR will increase significantly after bypass surgeries. Methods: Imaging data were acquired from 22 Moyamoya patients (11 months - 18 years, 14 females) using a 3T MRI system. All patients had unilateral or bilateral occlusion at ACA, MCA and/or PCA. Multi-delay ASL data (7 delays) were acquired at baseline and 15 minutes after acetazolamide administration. CBF and ATT were computed using the general kinetic model. CVR was computed as the percentage of CBF change compared with baseline CBF. Flow territories (right and left ACA, MCA, and PCA) were defined using the Harvard-Oxford atlases. Paired t-tests were conducted to compare the mean CVR, CBF, and ATT changes before and after bypass surgeries. Results: The figure shows the hemodynamic maps of an example patients. Overall, CVR and CBF in the affected regions increased after bypass; ATT in these regions decreased after bypass. For this cohort, our analysis showed that CVR of the affected regions increased significantly by 68% and ATT reduced significantly by 10.7% measured by multi-delay ASL, implying improved circulation and lower risk for strokes. Discussion: Multi-delay ASL was effective to detect improved CVR and reduced ATT in pediatric Moyamoya patients after bypass surgeries.

Takayasu’s arteritis during pregnancy: A case report

Takayasu’s arteritis (TA) is also known as aorto arteritis having an incidence is 13/per million population. Here, we report the case of a 30-year-old woman gravida 2, para 1, who was admitted for safe delivery at 38 weeks of pregnancy. Clinical examination revealed an absence of radial pulse and blood pressure (BP) in both upper limbs and lower limbs BP recording showed 150/90 mm Hg with a pulse rate of 112/min. She was a known case of TA diagnosed during her first pregnancy. An elective cesarean section was done and a healthy male baby weighing 3.2 kg was delivered. The postnatal period was uneventful. She was discharged on the 8th day. A magnetic resonance imaging (MRI) angiogram was done before the second pregnancy. There was complete occlusion of the left common carotid artery from the origin with occlusion of the left internal carotid artery and there was collateral refilling of the left anterior cerebral artery and middle cerebral artery from the posterior communicating artery. The left vertebral artery showed circumferential wall thickening with hypointense flap within.

Super-selective Wada test for pre-surgical leg motor function assessment: A case report.

Wada test is well-known to assess lateralization of memory and language functions; however, super-selective Wada (ss-Wada) to evaluate motor leg function is rare. We present a ss-Wada test within the anterior cerebral artery (ACA) to assess the motor function of the leg. Retrospective chart review. Comprehensive phase-I/II surgical evaluation revealed an ictal focus around the left post-central gyrus with immediate involvement around the left para-central regions. To avoid potential right leg motor dysfunction with the surgery, the patient underwent a ss-Wada procedure. Angiography revealed bilateral ACAs were supplied by the left A1 segment. Super-selective microcatheter injection of amobarbital into the left ACA was performed to avoid cross-filling the contralateral ACA. The ss-Wada test confirmed no right leg motor impairment. Afterward, a craniotomy with direct cortical stimulation confirmed that the left-sided ictal/peri-ictal zone had no clear leg motor function. The patient underwent disconnection of that region and remained seizure-free at 10-month post-op follow-up without any motor or sensory deficits in the right limbs. This case demonstrates the proof of concept for ss-Wada in assessing lower extremity motor function. The ss-Wada procedure accurately predicted no motor deficits in the right leg, consistent with preserved motor function post-surgery.

Intra-aneurysmatic thrombectomy in a distal anterior cerebral artery aneurysm.

Thrombectomy procedures following intra-aneurysmatic lesions are extremely rare, and few cases have been reported. This article describes a microsurgical intra-aneurysmatic thrombectomy (MIaT) for a distal anterior cerebral artery (DACA) aneurysm. We present the case of a 48-year-old female that was admitted to the emergency room, showing neurologic deterioration with focal deficits. A computed tomography angiography (CTA) scan revealed an aneurysm located in the distal segment of the left anterior cerebral artery. During the surgical procedure, after clipping, a wellformed clot was visualized through the aneurysm's wall obstructing the left DACA flow. We proceeded to open the aneurysm's dome to remove the thrombus and clip the aneurysm neck, re-establishing the flow of the left DACA. Intra-aneurysmatic thrombosis can occur as a complication during clipping, obstructing the distal flow of vital arteries and causing fatal results in the patient's postoperative status. MIaT is a good technique for restoring the flow of the affected vessel and allows a secure aneurysm clipping after thrombus removal.

A data-driven computational methodology towards a pre-hospital Acute Ischaemic Stroke screening tool using haemodynamics waveforms

Background and ObjectiveAcute Ischaemic Stroke (AIS), a significant global health concern, results from occlusions in cerebral arteries, causing irreversible brain damage. Different type of treatments exist depending on the size and location of the occlusion. Challenges persist in achieving faster diagnosis and treatment, which needs to happen in the first hours after the onset of symptoms to maximize the chances of patient recovery. The current diagnostic pipeline, i.e. “drip and ship”, involves diagnostic via advanced imaging tools, only available in large clinical facilities, which poses important delays. This study investigates the feasibility of developing a machine learning model to diagnose and locate occluding blood clots from velocity waveforms, which can be easily be obtained with portable devices such as Doppler Ultrasound. The goal is to explore this approach as a cost-effective and time-efficient alternative to advanced imaging techniques typically available only in large hospitals. MethodsSimulated haemodynamic data is used to conduct blood flow simulations representing healthy and different AIS scenarios using a population-based database. A Machine Learning classification model is trained to solve the inverse problem, this is, detect and locate a potentially occluding thrombus from measured waveforms. The classification process involves two steps. First, the region where the thrombus is located is classified into nine groups, including healthy, left or right large vessel occlusion, left or right anterior cerebral artery, and left or right posterior cerebral artery. In a second step, the bifurcation generation of the thrombus location is classified as small, medium, or large vessel occlusion. ResultsThe proposed methodology is evaluated for data without noise, achieving a true prediction rate exceeding 95% for both classification steps mentioned above. The inclusion of up to 20% noise reduces the true prediction rate to 80% for region detection and 70% for bifurcation generation detection. ConclusionsThis study demonstrates the potential effectiveness and efficiency of using haemodynamic data and machine learning to detect and locate occluding thrombi in AIS patients. Although the geometric and topological data used in this study are idealized, the results suggest that this approach could be applicable in real-world situations with appropriate adjustments. Source code is available in https://github.com/ahmetsenemse/Acute-Ischaemic-Stroke-screening-tool-.

A rare anatomical variation of the circle of Willis in a patient with an ischemic stroke

Purpose 
 The cerebral arterial circuit provides collateral circulation to the brain and protects the brain from ischemia, by sustaining tissue perfusion in case of reduced or impaired blood flow through its branches. Although many random anatomical variations in the circle of Willis (CoW) are of minor importance, some increase the risk of ischemic events, aneurysm, and atherosclerosis, and play an important role in endovascular and surgical treatment planning.  
 Case presentation 
 We report a rare arterial variation of the CoW diagnosed by computed tomography angiography in a patient with ischemic stroke. We found aplasia of the A1 segment of the left anterior cerebral artery and ipsilateral hypoplasia of the P1 segment of the left posterior cerebral artery.  
 Conclusion 
 For neurosurgeons, neurologists, and neuroradiologists, detailed knowledge of the numerous anatomical variations in the arterial supply to the brain is crucial to make a correct diagnosis and choose the appropriate treatment. The type of CoW variation influences stroke severity and outcome, with an incomplete CoW related to more severe conditions (higher National Institutes of Health Stroke Scale scores, more severe neurological deficits, and worse neurological outcomes) and poor prognosis. 

Abstract 213: Successful Mechanical Thrombectomy in Acute Stroke With Pre‐interventional Thrombolysis‐Induced Intracerebral Hemorrhage: Case Report

Introduction Intravenous thrombolytics (IVT) and mechanical thrombectomy (MT) have become the standards of care for treating patients with large vessel occlusion (LVO) acute ischemic strokes (AIS) [1‐4}. Intracerebral hemorrhage (ICH) is a main complication of IVT, with prevalence reported around 3.2% in a large multicentered meta‐analysis [2,6]. However, limited data remains about the safety and efficacy for patients to undergo MT with IVT associated pre‐interventional ICH as no randomized control trials or standard of care guidelines are available [2,4,5,7]. Methods NA Results 56‐yo male with history of alcohol abuse presented via EMS as a stroke alert with acute onset right hemiplegia, global aphasia, right facial droop, and leftward gaze preference two hours prior to arrival. RACE 10+ with NIHSS 24. No known history antiplatelet or anticoagulation use. Computerized Tomography (CT) Brain scan showed left middle cerebral artery (MCA) hyperdense sign with left insular cortical ribboning. CT angiography (CTA) showed near occlusive stenosis of the left carotid bulb with an acute thrombus within Supraclinoid Internal Carotid Artery (ICA) extending into the Left MCA and origin of Left Anterior Cerebral Artery (ACA). Patient was emergently administered IV‐tissue Plasminogen Activator (IV‐tPA) and taken for endovascular thrombectomy. During initial angiogram, after crossing the stenotic cervical bulb, the left Supraclinoid ICA and MCA occlusions were visualized. There was longitudinal partially occlusive thrombus extending from the M1 into the M2 divisions. No opacification of the inferior M2 branch was visualized, with perfusion deficit over the temporal, parietal and frontal regions. Additionally, extravasation of contrast was seen within the left basal ganglia region, concerning for hemorrhagic transformation from IV‐tPA. Reversal of IV‐tPA was initiated, and patient was given cryoprecipitate, platelets, and tranexamic acid. Decision to undergo MT was made secondary to severity of debilitating neurologic symptoms, age, and large perfusion deficit observed. He underwent single pass complete recanalization, TICI 2C using Stent retriever and aspiration. Left ICA stenting was not completed secondary to hemorrhagic transformation. Repeat CT Brain confirmed moderate left frontal lobe hemorrhage with vasogenic edema and 3mm left‐to‐right midline shift. No neurosurgical intervention required. Magnetic resonance imaging (MRI) Brain showed left cerebral hematoma with mass effect, acute infarct within left caudate nucleus, and minimal posterior cortical restricted diffusion without hemorrhagic conversion. Patient was monitored for 1 week with serial brain imaging. Patient was discharged on Aspirin 81 mg daily to inpatient rehabilitation with NIHSS 21, mRS 4 (0 prestroke). Today, in rehab he ambulates with walker with moderate expressive aphasia and right upper extremity weakness. Plan to follow‐up 2‐month post‐hospitalization for left ICA stenting. Conclusion While pre‐interventional IVT‐associated ICH in AIS with LVO are rare, few cases have been shown to have positive neurological outcomes [2,5,7]. We demonstrate a unique case of early identification of reperfusion hemorrhage on fluoroscopy with prompt reversal initiated. The decision to continue with MT based on downstream occlusion of basal ganglia hemorrhage not at further risk of expansion from reperfusion. The patient did well on follow‐up imaging despite the hemorrhage. Further randomized control clinical trials are required to establish best care guidelines, safety, and efficacy.

Abstract 117: Digitally Subtracted Angiogram & Biopsy Negative Recurrent Spontaneous Bilateral Anterior Cerebral Artery Territory Intracranial Hemorrhage

Introduction Up to 18% of spontaneous intracerebral hemorrhages are cryptogenic despite a thorough workup, usually noted in a lobar location. Although undetected on DSA, a significant proportion of these represent ruptured micro‐AVM/AVF or cavernous malformations that ultimately are amenable to surgical resection if detected on biopsy. However, occult cerebral amyloid angiopathy can also present similarly, and their management is markedly different. Methods We present a case of recurrent bilateral medial frontal hemorrhage in a patient without known cerebrovascular disease that evaded diagnosis despite hematologic evaluation, MRI, CTA, two DSAs, three clot evacuations with pathology, and brain biopsy. Results The patient is a 60‐year‐old previously healthy woman who presented with sudden onset right hemiparesis and speech arrest. CT revealed a left parasagittal hemorrhage. She was brought to the OR for clot evacuation. Pathology from the clot revealed blood vessels of multiple sizes consistent with meningeal vessels or underlying AVM/AVF. A 6‐vessel cerebral angiogram as unremarkable. The patient’s inpatient course was complicated by new onset Afib with RVR and asymptomatic DVT with PE, however no etiology of coagulopathy was detected. MRI brain showed no evidence of cerebral microbleed or other underlying pathology, noting only DWI + FLAIR hyperintensity in the left ACA territory. The patient was diagnosed with ACA territory stroke complicated by PH2‐type hemorrhagic conversion. She was initially placed on IV Heparin, before transition to apixaban uneventfully. She continued to recover in the hospital and was eventually discharged to rehab. She re‐presented 1 month later with worsening behavioral arrest and right hemiparesis. CT head revealed recurrence of left parasagittal ICH. She underwent clot evacuation in the OR again and repeat pathology was unrevealing. A repeat MRI showed only the evident bleed and a subtle hyperintensity in the right occipital cortex suspicious for an interval subacute occipital lobe stroke with laminar necrosis, ostensibly from Afib. She improved clinically and was discharged to rehab with a diagnosis of recurrent hemorrhage attributed to anticoagulant use and recent stroke. She was discharged this time on no anticoagulant or antiplatelets. She re‐presented 1 month later with sudden onset speech arrest, but now with left hemiparesis. CT revealed a right parasagittal hemorrhage. She was brought to the OR for emergent clot evacuation and parenchymal biopsy – which was initially normal. A repeat 6‐vessel DSA was again unremarkable as was repeat brain MRI. The patient’s parenchymal biopsy was sent for specific congo‐red and immunohistochemistry for beta‐amyloid. IHC revealed beta‐amyloid plaques in the parenchyma and vessel walls, confirming a diagnosis of CAA. Conclusion Apparently cryptogenic lobar hemorrhage may be caused by both occult micro‐AVM/fistula and CAA. As in this case, when a patient experiences recurrent DSA negative lobar hemorrhages, biopsy should be pursued. This case was particularly challenging given the anatomical plausibility of parasagittal AVM/fistula given its midline location and venous drainage, considering the patient’s evident predisposition to systemic venous thrombosis hemorrhagic venous infarction mimicking lobar ICH is also possible. We present this case to raise awareness of the potential need for early biopsy, especially in patients who may also require anticoagulation or antiplatelet medications.

Abstract 088: Treatment of a Ruptured AVM with Inflow Aneurysms: Mixed approach using coil and liquid embolization

Introduction Arteriovenous malformations(AVMs) are high‐flow vascular abnormalities characterized by direct communications between arteries and veins of various complexities. Cerebral AVMs may manifest with new‐onset seizures or intraparenchymal (IPH) or subarachnoid hemorrhages (SAH). Life‐threatening bleeds may occur from the AVM nidus or associated aneurysms. We report a patient with hemorrhage from a complex AVM that included a prominent nidus and large inflow aneurysms requiring several endovascular techniques for treatment. Methods N/A Results A 35 year old male patient newly arrived from the Philippines with a history of hypertension presented to the hospital after being found unresponsive at home with frothing from the mouth and incontinence. The patient regained consciousness in the ER, complaining of a posterior headache which he had been experiencing for a week. NIHSS of 0 was noted with no neurological deficits. CT‐head revealed extensive SAH in interhemispheric falx anterior to and outlining the entire corpus callosum with intraventricular extension. CT‐ angiogram demonstrated a prominent AVM with a well‐developed nidus situated to the left of midline about the posterior corpus callosum. Two large inflow aneurysms, felt to be the rupture site, projecting from the proximal left pericallosal artery were also demonstrated. An incidental ACA aneurysm was also noted. Cerebral angiography redemonstrated these findings as well as the drainage of the AVM primarily through the straight sinus. Graded as Spetzler Martin 4. Common femoral approach was used. An access catheter was passed into the left ICA. The pericallosal artery was accessed with a detachable tip microcatheter which was further advanced past the inflow aneurysms into the main pedicle feeding the AVM nidus. The inflow aneurysms were accessed and embolized with coils using a second microcatheter prior to AVM embolization. This sealed off access to the aneurysms and parent vessel against liquid agent backflow. Onyx‐18 was then injected into the main AVM pedicle under a blank roadmap. Extensive but partial filling of the AVM was noted anteriorly but full embolization of the posterior aspect of the nidus was not achieved. Finally coiling of the ACA aneurysm was performed after accessing the right ICA. An MRI with and without contrast was performed and an expected acute infarction in the left ACA territory was observed. A repeat angiogram was performed a week later revealing posterior cerebral artery and posterior choroidal branches feeding the posterior 1/3 of the AVM. Embolization of three posterior feeding pedicles was subsequently performed utilizing dilute NBCA. Because of coil impaction the proximal pericallosal inflow aneurysm required re‐treatment with further coil placement 8 months after initial treatment. The patient has regular angiograms to monitor the AVM, which appears stable without significant residual shunting. Conclusion Ruptured AVMs are fatal events requiring careful treatment to prevent further bleeding while preserving viable brain tissue. AVMs are fragile formations of vessels which can receive collaterals from multiple targets and often have associated high risk features like inflow aneurysms. Accordingly endovascular treatment may require a mixture of techniques to ensure adequate and safe embolization. Regular monitoring of these structures and adjacent vessels is required to prevent any poor outcomes.

Frontal lobe circulation in patients of schizophrenia with and without cannabis dependence: A comparative study

Abstract Background: The symptom profile of schizophrenia is related to the regional cerebral circulations as advocated in various studies. Cannabis dependence in schizophrenia is more common than in the general population. Previous studies comparing the frontal lobe function in schizophrenia with and without comorbid cannabis dependence have shown conflicting results. In this study, we compared the blood flow in the frontal lobes of patients of schizophrenia with and without comorbid cannabis dependence. Aim of the Study: The aim was to compare the blood flow in the anterior cerebral artery (ACA) and middle cerebral artery (MCA), in patients of schizophrenia with and without cannabis dependence. Materials and Methodology: This was a hospital-based cross-sectional study. After fulfilling the inclusion and exclusion criteria 28 patients of schizophrenia with cannabis dependence and 28 patients of schizophrenia without cannabis dependence were selected for the study. The blood flow was assessed using Trans-cranial Doppler (TCD) in the ACA and MCA of the left and right sides in both the study groups through the temporal window. Results: A statistically significant difference (P = 0.049) was found in the pulsatility index of the left ACA where it was lower in schizophrenia patients with cannabis dependence (0.97 ± 0.24) in comparison to schizophrenia patients without co-morbid cannabis dependence (1.11 ± 0.28). However, after using Bonferroni correction for multiple comparisons (P < 0.05/12 i.e., P < 0.004), this comparative statistics too lost its significance. No significant difference was found in the mean flow velocity and resistance index of frontal lobe circulation between the two groups. Conclusion: Chronic cannabis use is having some sparing effect on vascular resistance in the frontal circulation of schizophrenia patients. However, this effect is not significant enough to alter the pattern of frontal circulation.

Heritability of cerebral blood flow in adolescent and young adult twins: an arterial spin labeling perfusion imaging study.

Blood perfusion is a fundamental physiological property of all organs and is closely linked to brain metabolism. Genetic factors were reported to have important influences on cerebral blood flow. However, the profile of genetic contributions to cerebral blood flow in adolescents or young adults was underexplored. In this study, we recruited a sample of 65 pairs of same-sex adolescent or young adult twins undergoing resting arterial spin labeling imaging to conduct heritability analyses. Our findings indicate that genetic factors modestly affect cerebral blood flow in adolescents or young adults in the territories of left anterior cerebral artery and right posterior cerebral artery, with the primary contribution being to the frontal regions, cingulate gyrus, and striatum, suggesting a profile of genetic contributions to specific brain regions. Notably, the regions in the left hemisphere demonstrate the highest heritability in most regions examined. These results expand our knowledge of the genetic basis of cerebral blood flow in the developing brain and emphasize the importance of regional analysis in understanding the heritability of cerebral blood flow. Such insights may contribute to our understanding of the underlying genetic mechanism of brain functions and altered cerebral blood flow observed in youths with brain disorders.

Left anterior cerebral artery arising from a right internal carotid artery: a rare case of carotid-anterior cerebral artery anastomosis

Carotid-anterior cerebral artery anastomosis (carotid-ACA anastomosis) is described as infrequent vascular connections between the pre-ophthalmic segment of the internal carotid artery (ICA) and the A1 segment of the anterior cerebral artery (ACA). The embryological origin of these variant is still unclear and they are often associated to other vascular anomalies of the circle of Willis, as well as to the presence of aneurysms. Carotid-ACA anastomosis is often right-sided although left and bilateral cases have also been described. We report a rare case by MR angiography of a carotid-ACA anastomosis in which the abnormal vessel arises from the right ICA and takes an infraoptic course to join the A2 segment of the contralateral ACA, making this vascular anomaly function as a ‘left ACA with an origin at the right ICA’. The A1 segment of the left ACA is absent and both A2 segments of the ACAs present fenestration. To our knowledge, no similar cases have been reported in English literature so far.

Disappearance of a moyamoya-related distal anterior cerebral artery aneurysm after target bypass revascularization: illustrative case.

Aneurysm formation is a complication of moyamoya disease (MMD). Distal anterior cerebral artery (ACA) aneurysms account for approximately 1% of MMD-related aneurysms. We report a case of target bypass for adult patients with MMD who presented with intracranial hemorrhage due to rupture of a distal ACA aneurysm, whose disappearance was confirmed postoperatively. A 45-year-old woman presented with sudden-onset headache and loss of consciousness. Head computed tomography showed hemorrhage in the genu of the corpus callosum with intraventricular extension. Digital subtraction angiography (DSA) revealed Suzuki stage III MMD and a left A3 segment aneurysm. Superficial temporal artery (STA)-middle cerebral artery (MCA) bypass and STA-ACA target bypass were performed to reduce hemodynamic stress on the left ACA. DSA 6 months after surgery showed patency of both bypasses and disappearance of the aneurysm. At the 20-month follow-up, the patient was asymptomatic and neurologically intact. Bypass revascularization may be an effective treatment to reduce hemodynamic stress and eliminate MMD-related aneurysms.

MISLEADING PARAFALCINE MASS: A CASE REPORT

A parafalcine mass can be misdiagnosed with Giant intracranial aneurysm because of lack of specific radiological features. Giant aneurysm are rare comprising of 5 % of all intracranial aneurysm and commonly located on internal carotid artery and middle cerebral artery. A case which we describe, located on left distal anterior cerebral artery, is rare. A 53 old male presented with weakness in right lower limb associated with headache and dysarthria. On examination, Power of rt lower limb was 3/5 with normal vitals. On CT imaging, findings showed midline frontal parafalcine well defined mass with areas of hypodensity which conclude provisional diagnosis of parafalcine meningioma. MRI and CT Angiography was done for further confirmation where report was consistent with parafalcine meningioma. while operating following mid frontal craniotomy, findings are suggestive of thrombosed giant aneurysm arising from left distal anterior cerebral artery. Applying the clip at distal ACA prevented from possible unfortunate incidence and complete excision without complications. The postoperative period was uneventful with no new neurological deficit. This case is shared here as it is a rare kind of lesion which mislead surgeons during surgical intervention. So, clinician must be aware of the thrombosed aneurysm mimicking as intracranial neoplasms as differential diagnosis. It gives good result and patient satisfaction, without any neurological deficits.

Unilateral rete mirabile in multiple intracranial arteries with ipsilateral agenesis of the internal carotid artery: a case report

BackgroundRete mirabile of the cerebral artery is a rare anomaly, with most previous cases occurring in the middle cerebral artery or internal carotid artery. Here, we present the first report of unilateral rete mirabile in multiple intracranial arteries with ipsilateral internal carotid artery agenesis.Case presentationA 64-year-old Japanese woman was brought to the emergency department of our hospital in a deep coma. Computed tomography of the head showed severe intraventricular hemorrhage with subarachnoid hemorrhage. Computed tomography angiography showed not only congenital left internal carotid artery agenesis, but also rete mirabile of the left posterior communicating artery, the left posterior cerebral artery, and the left anterior cerebral artery. This unilateral vessel anomaly complex may have contributed to the formation of a peripheral aneurysm arising from a perforating branch of the pericallosal artery, which ruptured. The patient underwent urgent bilateral external ventricular drainage, but deteriorated and was declared brain dead.ConclusionsWe report the first case of unilateral rete mirabile in multiple intracranial arteries. Because the cerebral arteries in patients with rete mirabile may be vulnerable, close attention should be paid to the development of cerebral aneurysms.

Stroke Secondary to Fibromuscular Dysplasia

FMD is a rare systemic vascular disease characterized by abnormal cell proliferation in the artery walls, leading to artery narrowing, twisting, or bulging. It commonly affects the carotid and renal arteries and can result in renal diseases and stroke. This paper presents a case study of a 39-year-old unhoused female patient who experienced a stroke secondary to fibromuscular dysplasia (FMD) and left ventricular thrombus. The patient presented with asymmetric movement of the extremities and psychosis, so intoxication was initially suspected. However, further examination revealed facial asymmetry and motor weakness. CT scans showed a left anterior cerebral artery infarction and irregular contour of the cervical internal carotid arteries, consistent with FMD and carotid thrombus. Management involved stabilizing the patient, providing supportive treatment, and controlling blood pressure. Thrombolytic therapy was not administered due to the time elapsed since symptom onset. The patient was started on anticoagulation for the carotid plaque and left ventricular thrombus. A transthoracic echocardiogram revealed a large left ventricular thrombus and left atrial enlargement, and the patient was started on heart failure medications. FMD and left ventricular thrombus are not directly related, but FMD can contribute to thrombus development through its impact on the cardiovascular system, including hypertension, arterial wall damage, aneurysm development, or dissection. Treatment for FMD may involve medication, observation, or surgical interventions like angioplasty and stenting. Anticoagulation therapy is essential for managing the left ventricular thrombus. This case highlights the importance of early diagnosis and treatment of FMD to prevent complications such as stroke. It is important to consider FMD in the diagnosis of younger patients with a stroke, especially those with a history of hypertension, substance abuse, or other risk factors. Further research is needed to better understand the relationship between FMD and stroke and to optimize treatment strategies for these patients.

A giant A4-A5 distal anterior cerebral artery aneurysm treated with microsurgical clip reconstruction

Background. Aneurysms of the distal anterior cerebral artery (DACA) are uncommon; they often form near the pericallosal-callosomarginal junction and are typically small. To our knowledge, giant DACA aneurysms developing from the more distant parts of the anterior cerebral artery (ACA), A4-5, have been described only once in the literature. Case description. A 66-year-old gentleman reported with a brief loss of consciousness followed by weakness in his right lower leg. The patient was admitted with a Glasgow Coma Score (GCS) of 15. A computed tomography (CT) scan of the head revealed a left hyperdense mass in the frontal parasagittal supracallosal region. Contrast MRI revealed a heterogeneously enhancing mass measuring 35x30x25 mm. CT angiography (CTA) revealed a small saccular aneurysm on the posteromedial aspect of the mass, perpendicular to the vertical plane of the coronal suture, corresponding to the A4-A5 junction of the left ACA. Through a left paramedian craniotomy, a modified anterior interhemispheric approach that was more posterior than the conventional projection was performed. A giant partially thrombosed was found. The aneurysm was resected, and the neck was reconstructed using four clips placed on top of them to enhance the clipping force over any remaining thrombus. The patient recovered as expected and was neurologically intact three months later. Conclusion. Giant distal anterior cerebral artery (DACA) aneurysms found in the A4-A5 segment represent a pathologically uncommon phenomenon. Due to the rarity of giant aneurysms at this location, their reporting is important to inform meticulous pre-operative planning.

Diagnosis and Prevention of Scabies in Low Mobility Patients with Cognitive Impairment

Scabies is an infectious skin disease caused by the human-specific ectoparasite Sarcoptes scabiei var. hominis. Despite the comprehensive study of scabies, the problem of its timely diagnosis in low-mobility patients with neurological and cognitive impairments remains relevant all over the world. Simultaneous administration of a large number of medications to patients with limited mobility may mask the clinical manifestations of scabies and mistakenly attribute itching to manifestations of skin allergic reactions or other dermatoses. The authors observed patient K., who was admitted in FCBRN of FMBA of Russia from 14.11.2022 to 15.11.2022. Clinical diagnosis upon admission: I69.3. The consequences of a stroke. Early recovery period of ischemic stroke in the basin of the left middle cerebral artery from 09.08.2022, atherothrombotic subtype according to TOAST criteria. Right-sided hemiparesis. Gross aphasia. Violation of the pelvic organs function. RMS 5. Comorbid diseases: arterial hypertension, controlled, the risk of CVE 4 (very high). The target blood pressure is less than 135/85 mmHg. Occlusion of the left anterior cerebral artery, middle cerebral artery. Toxic-allergic dermatitis (medicinal) in the acute phase. Based on a set of clinical data and laboratory detection of the pathogen, patient K. was diagnosed with B86 — scabies. Even though the patient was under medical supervision at the ambulatory step, scabies was not diagnosed timely. Late diagnosis of scabies leads to the spread of the disease and an unfavorable epidemiological situation.

Rare Anatomic Variation of Anterior Communicating Artery Associated with a Rupture of Saccular Aneurysm

Although most cerebral aneurysms are considered as acquired degenerative lesions, diverse anatomical variations in the circle of Willis have been encountered, some of which may play an important role in lesion hemodynamics and pathogenesis. The coalescence of the small vascular plexus to form the anterior communicating artery at the 6-7-week embryological stage may lead to developmental variations, such as fenestration and duplication. Herein, we report a rare anatomical variant of the anterior communicating artery that was concomitantly identified with a ruptured aneurysm. Both the right and left anterior cerebral arteries were connected by three anterior communicating arteries. A vertical segmental artery was present and connected the two anterior communicating arteries, forming an H-shape or plexiform structure. Furthermore, a 0.6×0.4 cm-sized saccular aneurysm with antero-inferior projection was present in the middle anterior communicating artery. The combination of triplication and H-shape in the present case was compared to previously reported anatomical variants.