A case of meningoencephalitis caused by multisystem inflammatory syndrome in adult SARS-CoV-2 infection.

A 37-year-old woman was hospitalized with fever and consciousness disturbance. She showed systemic inflammation with stress cardiomyopathy. Brain computed tomography showed diffuse brain edema. Cerebrospinal fluid (CSF) findings revealed markedly elevated cerebrospinal fluid pressure with pleocytosis, elevated protein, and elevated interleukin 6. The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) nicking enzyme amplification reaction test using a nasopharyngeal swab was positive, and the patient was diagnosed with SARS-CoV-2 infection. From the negative result of the CSF SARS-CoV-2 polymerase chain reaction test and no findings of bacterial or viral infection, we diagnosed meningoencephalitis by multisystem inflammation syndrome in adults (MIS-A). Intravenous methylprednisolone pulse therapy improved her symptoms and brain edema. There have been no cases of MIS-A with meningoencephalitis, and no initial treatment strategy has been established, especially in emergency cases of suspected MIS-A. The present case suggested Early intravenous methylprednisolone pulse with anti-coronaviral therapies after the exclusion of bacterial infection would be useful in suspected MIS-A with emergent meningoencephalitis cases.

Geriatric nutrition risk index predicts prolonged post-stroke dysphagia in acute ischemic stroke.

BACKGROUND: Post-stroke dysphagia (PSD) is a common complication after stroke. Malnutrition inhibits stroke recovery and is associated with stroke mortality. However, no studies have investigated the effects of nutritional state at admission on prolonged PSD. METHODS: We retrospectively analyzed ischemic stroke patients in our institute from January 2018 to December 2020. Swallowing function was assessed using the Food Oral Intake Scale; prolonged PSD was defined as levels 1-3 at 14 days after admission. The Geriatric Nutritional Risk Index (GNRI) was used to assess nutritional risks, which were classified as follows: >98, no nutritional risk; 92-98, mild nutritional risk; 82-92, moderate nutritional risk; and <82, severe nutritional risk. The association between GNRI and prolonged PSD was assessed. RESULTS: Of 580 patients (median age, 81 years; male, 53%), prolonged PSD was detected in 117 patients. Patients with severe dysphagia had older age, higher pre-stroke modified Rankin Scale score, lower GNRI, and higher National Institutes of Health Stroke Scale score. Logistic regression analysis revealed that lower GNRI was independently associated with prolonged PSD (continuous value; adjusted odds ratio [OR] 1.03, 95% confidence interval [CI] 1.00-1.05). In addition, when "severe" and "moderate" nutritional risk was analyzed as a single class, moderate or severe nutritional risk (GNRI < 92) was independently associated with prolonged PSD (adjusted OR 2.50, 95% CI 1.29-4.87), compared with no nutritional risk patients (GNRI > 98). CONCLUSIONS: In acute ischemic stroke, lower GNRI at admission was independently associated with prolonged PSD, suggesting that GNRI at admission might identify patients at risk of prolonged PSD.

Prognostic factors for acute ischemic stroke in patients undergoing hemodialysis.

BACKGROUND: Acute ischemic stroke (AIS) is a critical complication in patients undergoing dialysis. Although the improvement of AIS management is an urgent requirement, few studies have evaluated the prognostic factors of AIS in these patients. This study aimed to assess the relationship between clinical factors in patients undergoing dialysis and the prognosis of AIS. METHODS: Among 1267 patients who were hospitalized for AIS in Sendai City Hospital from January 2015 to June 2020, 81 patients undergoing hemodialysis were retrospectively enrolled. Multivariate analysis was performed to evaluate the effect of baseline characteristics, dialysis factors, and neurological severity of patients at admission [National Institutes of Health Stroke Scale (NIHSS) score] on in-hospital mortality, physical disability, and the need for rehabilitation transfer. RESULTS: A higher NIHSS score was a critical risk factor for each outcome and the only significant factor for in-hospital mortality [odds ratio (OR)/point 1.156, 95% confidence interval (CI) 1.054-1.267]. The risk factors of physical disability were NIHSS score (OR/point 1.458, 95% CI 1.064-1.998), older age (OR/year 1.141, 95% CI 1.022-1.274), diabetic nephropathy (OR 7.096, 95% CI 1.066-47.218), and higher premorbid modified Rankin scale (mRS) score (OR/grade 2.144, 95% CI 1.155-3.978); while those of rehabilitation transfer were a higher NIHSS score (OR/point 1.253, 95% CI 1.080-1.455), dialysis vintage (OR/year 1.175, 95% CI 1.024-1.349), and intradialytic hypotension before onset (OR 5.430, 95% CI 1.320-22.338). CONCLUSIONS: Along with neurological severity, dialysis vintage, intradialytic hypotension, and diabetic nephropathy could worsen the prognosis of patients with AIS undergoing hemodialysis.

Carotid web leads to new thrombus formation: computational fluid dynamic analysis coupled with histological evidence.

Carotid web has been recognized as a rare cause of ischemic stroke with high recurrence rate. We describe a 48-year-old woman with carotid web who developed embolic stroke. We obtained a fresh thrombus from the internal carotid artery when carotid endarterectomy was performed. A preoperative computational fluid dynamics (CFD) study showed stagnation of blood around the web structure as well as the low wall shear stress. The rheological analysis newly disclosed mechanisms of thrombus formation related to the carotid web. CFD study in the carotid web may determine indication and timing of surgical interventions with further accumulation of clinical evidence.

Early neurosyphilis presenting with multiple cranial nerve palsies: A case report of management by combined penicillin-corticosteroid treatment.

Early neurosyphilis commonly appears in basilar meninges, and its meningeal inflammation can spread to neighboring cranial nerves, resulting in some cranial nerve palsies. Herein, we report a case of a 51-year-old man who presented with right peripheral facial nerve palsy. His symptoms completely disappeared with prednisolone monotherapy without antibiotics use and were not exacerbated during clinical treatment. However, 2 months after remission of seventh cranial neuropathy, fifth and eighth cranial neuropathies appeared on the right side. Serologic tests for syphilis were revealed to be abnormal. Finally, the patient was diagnosed with early neurosyphilis with multiple cranial palsies. His neurological symptoms were markedly improved by combined penicillin-corticosteroid treatment. Systemic corticosteroids could be effective as adjunctive therapy to ameliorate neurological sequelae in early neurosyphilis.

Seasonal Variations in Neurological Severity and Outcomes of Ischemic Stroke　- 5-Year Single-Center Observational Study.

BACKGROUND: Seasonal variations in the severity and outcomes of stroke remain unclarified.Methods and Results:A total of 2,965 acute ischemic stroke patients from a single-center prospective registry were studied. Among the total patients, stroke onset did not vary by season, though it varied with a peak in winter when limited to patients >75 years old (P=0.026), when limited to patients with moderate-to-severe initial neurological deficits (National Institutes of Health Stroke Scale Score ≥10, P=0.014), and when limited to those with cardioembolic stroke (n=1,031, P=0.010). In 1,934 patients with noncardioembolic stroke, stroke onset did not vary by season. After multivariable adjustment, moderate-to-severe neurological deficits were more common in winter (odds ratio 1.37, 95% confidence interval 1.10-1.72) and spring (1.27, 1.01-1.60), and death at 1 year was more common in summer than in fall (1.55, 1.03-2.36); death or dependency (modified Rankin Scale score 3-6) and death or bedridden (score of 5-6) were not differently common among the seasons. CONCLUSIONS: Overall ischemic stroke showed a fairly even distribution among the 4 seasons. Cardioembolic stroke was more common in winter. Ischemic stroke patients had more moderate-to-severe initial neurological deficits in winter and spring. Poor clinical outcomes at 1 year were generally similar among the seasons. Ischemic stroke is not necessarily a winter-dominant disease.

Fatal Community-Acquired Clostridioides difficile Infection as a Cause of Listeria Meningitis: A Case Report.

A 77-year-old woman with a history of total gastrectomy was transferred to our hospital with complaints of fever and consciousness disturbance for five days. She had fever and consciousness disturbance with positive meningeal signs. Laboratory findings indicated an elevated inflammatory response and hypoalbuminemia, and computed tomography (CT) of the body indicated intestinal gas retention and mild ascites. Cerebrospinal fluid analysis revealed pleocytosis with elevated protein levels and a diagnosis of Listeria meningitis was made. Treatment with ampicillin/sulbactam was started, and her fever and consciousness disturbance resolved on day 2. However, on day 3, her fever and conscious disturbance deteriorated, and she went into shock subsequently. Laboratory findings revealed deteriorated inflammatory response and hypoalbuminemia. Body CT showed an obvious distended bowel loop and intestinal edema. A stool culture revealed positive Clostridioides difficile toxin B, and we diagnosed her with Clostridioides difficile infection (CDI). Although intravenous metronidazole was initiated, she died due to prolonged hypovolemic shock. We considered she had community-acquired CDI because her CDI emerged immediately after the initiation of antibiotics, symptom deterioration within 48 hours of admission, and abnormal abdominal CT findings at admission. Listeria meningitis can develop based on community-acquired CDI. Because CDI can have a very rapid and fatal course and is sometimes complicated by other infectious diseases, clinicians should pay attention to this complication.

Clinical significance of fluid-attenuated inversion recovery vascular hyperintensities in transient ischemic attack.

BACKGROUND AND PURPOSE: Fluid-attenuated inversion recovery vascular hyperintensity (FVH) is often identified in patients with acute ischemic stroke. The purpose of this study was to determine the clinical significance of FVH in patients with transient ischemic attack (TIA). METHODS: Consecutive inpatients with TIA who underwent MRI within 24 hours of symptom onset were studied. The frequency, relative factors, and time course of FVH were determined. RESULTS: Of the 202 patients who were enrolled (76 women, mean age, 69.0 ± 13.2 years), FVH was identified in 41 patients (20%). Multivariate analysis showed that atrial fibrillation (odds ratio, 7.14; 95% confidence interval [CI], 2.69-18.1), arterial occlusive lesion (odds ratio, 4.89; 95% CI, 3.03-12.2), and hemiparesis (odds ratio, 2.81; 95% CI, 1.17-7.48) was independently associated with FVH. Of 23 recurrence-free patients with FVH positive undergoing follow-up MRI at a median of 7 days after the onset, FVH was no longer positive in 15 patients (65%). Atrial fibrillation was more common (P=0.027) and arterial occlusive lesion was less common (P<0.001) in patients with transient FVH compared with those with persistent FVH. Within 90 days after the onset, 13 patients developed recurrent TIA or ischemic stroke. After Cox proportional hazard analysis, FVH (hazard ratio, 3.65; 95% CI, 1.09-12.7), arterial occlusive lesion (hazard ratio, 4.15; 95% CI, 1.18-17.1), and coexistence of FVH and arterial occlusive lesion (hazard ratio, 13.9; 95% CI, 3.36-71.0) were significantly associated with recurrent TIA or ischemic stroke. CONCLUSIONS: The presence of FVH early after symptom onset may help to diagnosis TIA, to identify the potential mechanisms of TIA and to predict recurrence risk after a TIA.

Impact of early blood pressure variability on stroke outcomes after thrombolysis: the SAMURAI rt-PA Registry.

BACKGROUND AND PURPOSE: The present study determines associations between early blood pressure (BP) variability and stroke outcomes after intravenous thrombolysis. METHODS: In 527 stroke patients receiving intravenous alteplase (0.6 mg/kg), BP was measured 8 times within the first 25 hours. BP variability was determined as ΔBP (maximum-minimum), standard deviation (SD), coefficient of variation, and successive variation. RESULTS: The systolic BP course was lower among patients with modified Rankin Scale (mRS) 0 to 1 than those without (P<0.001). Most of systolic BP variability profiles were significantly associated with outcomes. Adjusted odds ratios (95% confidence interval) per 10 mm Hg (or 10% for coefficient of variation) on symptomatic intracerebral hemorrhage were as follows: ΔBP, 1.33 (1.08-1.66); SD, 2.52 (1.26-5.12); coefficient of variation, 3.15 (1.12-8.84); and successive variation, 1.82 (1.04-3.10). The respective values were 0.88 (0.77-0.99), 0.73 (0.48-1.09), 0.77 (0.43-1.34), and 0.76 (0.56-1.03) for 3-month mRS 0 to 1; and 1.40 (1.14-1.75), 2.85 (1.47-5.65), 4.67 (1.78-12.6), and 1.99 (1.20-3.25) for death. Initial BP values before thrombolysis were not associated with any outcomes. CONCLUSIONS: Early systolic BP variability was positively associated with symptomatic intracerebral hemorrhage and death after intravenous thrombolysis.

Intravenous alteplase at 0.6 mg/kg for acute stroke patients with basilar artery occlusion: the stroke acute management with urgent risk factor assessment and improvement (SAMURAI) Recombinant tissue plasminogen activator registry.

BACKGROUND: The therapeutic efficacy of low-dose intravenous alteplase (0.6 mg/kg) for basilar artery occlusion (BAO) remains unknown. METHODS: BAO patients enrolled from the Japanese multicenter registry involving 600 stroke patients treated with the low-dose intravenous alteplase were studied. RESULTS: Twenty-five patients had BAO (8 women ranging from 32-92 years of age; mean baseline National Institutes of Health Stroke Scale [NIHSS] score 16). The stroke subtype was cardioembolic in 15 patients and atherothrombotic in 4 patients. BAO was recanalized during hospitalization in 18 (78%) of 23 patients undergoing follow-up angiography. Within the initial 24 hours, 14 patients (56%) had a ≥ 8-point decrease in the NIHSS score, being more common than 267 patients with middle cerebral artery occlusion (MCO) from the same registry (odds ratio [OR] 2.50; 95% confidence interval [CI] 1.06-5.97) after adjustment by sex, age, and baseline NIHSS score. In addition, 4 patients (16%) had a ≥ 4-point increase in the score, being marginally more common than MCO patients (OR 3.13; 95% CI 0.81-10.25). Symptomatic intracranial hemorrhage within the initial 36 hours (8% v 5%), independence at 3 months (modified Rankin Scale score ≤ 2, 48% v 52%), and mortality at 3 months (4% v 6%) were similar when comparing BAO and MCO patients. When compared with previous studies of BAO, vital and functional outcomes at 3 months were relatively better in our study. CONCLUSIONS: The use of low-dose alteplase resulted in similar outcomes when comparing acute BAO and MCO patients.

Stroke outcomes of Japanese patients with major cerebral artery occlusion in the post-alteplase, pre-MERCI era.

This study examined outcomes of patients with acute ischemic stroke (AIS) with major cerebral artery occlusion after the approval of intravenous recombinant tissue-type plasminogen activator (IV rt-PA) but before approval of the MERCI retriever. We retrospectively enrolled 1170 consecutive patients with AIS and major cerebral artery occlusion (496 women; mean age, 73.9 ± 12.3 years) who were admitted within 24 hours after the onset of symptoms to 12 Japanese stroke centers between October 2005 and June 2009. Cardioembolism was a leading cause of AIS in this group (68.2%). The occlusion sites of the major cerebral arteries included the common carotid artery and internal carotid artery (ICA; 29.6%), middle cerebral artery (52.2%), and basilar artery (7.6%). Recanalization therapy (RT) was performed in 32.0% of patients (IV rt-PA, 20.0%; neuroendovascular therapy, 9.4%; combined, 2.5%). Symptomatic intracerebral hemorrhage within 36 hours with a ≥ 1-point increase in the National Institutes of Health Stroke Scale score occurred in 5.3% of the patients. At 3 months (or at hospital discharge), 29.3% of the patients had a favorable outcome (based on a modified Rankin scale score of 0-2), 23.8% were bedridden, and 15.6% died. After multivariate adjustment, RT was positively associated with a favorable outcome and negatively associated with death, whereas age, baseline National Institutes of Health Stroke Scale score, and ICA occlusion were negatively associated with a favorable outcome and positively associated with death. One-third of the patients with AIS and major cerebral artery occlusion were treated with RT, which was independently associated with favorable outcomes and death. However, 40% of the patients became bedridden or died during the post-alteplase, pre-MERCI era in Japan.

Eustachian Valve-Enhanced Paradoxical Cerebral Embolism: A Case Report.

Cryptogenic stroke includes many suspicious embolic causes that do not fulfill the Trial of Org 10172 in Acute Stroke Treatment (TOAST) classification criteria. Atrial fibrillation (AF) is one of the major hidden causes of cryptogenic stroke, and an implantable loop recorder (ILR) is widely used for detecting AF. Herein, we report a case of paradoxical cerebral embolism due to a large Eustachian valve with large PFO under no molecular complete remission (CR) of acute monocytic leukemia (AMoL). A 75-year-old man arrived at our emergency room because of aphasia and right hemiparesis. He had a history of two cryptogenic strokes and implanted ILR. Magnetic resonance imaging showed left middle cerebral artery occlusion with slight acute ischemic lesion. The red clot was retrieved by mechanical thrombectomy, and complete recanalization was achieved. We checked ILR, but there was no AF. Transesophageal echocardiography revealed a large patent foramen ovale (PFO) and the large Eustachian valve in the right atrium. Although obvious deep vein thrombosis (DVT) was not detected in venous ultrasonography of the lower extremities, Wilms' tumor 1 messenger ribonucleic acid (WT1mRNA) expression level was high, and AMoL was considered to be not in molecular CR, suggesting a high risk of thrombosis to the large Eustachian valve. From large PFO and no molecular CR of AMoL, we diagnosed him with paradoxical cerebral embolism. Ruling out of AF by ILR and other etiologies, such as aortic or carotid atherosclerosis and pulmonary shunt, also supported the diagnosis of paradoxical cerebral embolism. Even in the absence of obvious DVT, paradoxical cerebral embolism should be considered in cases of a large Eustachian valve and PFO with a hypercoagulable state.

Steroid Rebound Phenomenon as a Cause of Delayed Cerebral Vasospasm in Post-Splenectomy Pneumococcal Meningitis: A Case Report.

Pneumococcal meningitis as an overwhelming post-splenectomy infection (OPSI) has a higher risk of neurological complications and is sometimes life-threatening. In acute pneumococcal meningitis, four days of dexamethasone is widely used for the prevention of neurological complications. Herein, we report a 68-year-old woman with the diagnosis of pneumococcal meningitis as OPSI. With adequate antibiotics and dexamethasone, her symptoms gradually improved. However, after dexamethasone withdrawal, her consciousness got worse and got into a coma. Brain magnetic resonance imaging revealed acute cerebral infarctions in the bilateral middle cerebral artery territory with multiple vascular stenoses and hydrocephalus. Vascular stenoses improved by follow-up, suggesting cerebral vasospasm. There were no suggestive findings of cerebral vasculitis. Follow-up cerebrospinal fluid analysis showed remained pleocytosis with no bacteria, which could not suggest meningitis recurrence. Since steroid therapy was rapidly withdrawn, we diagnosed that the cerebral vasospasm was due to the steroid rebound phenomenon. The steroid rebound phenomenon due to the excessive immune response to bacterial microstructures has been reported in pneumococcal meningitis. Especially, the present case was asplenia and the usual dexamethasone use would not adequately suppress the immune response to bacterial microstructures. Since pneumococcal meningitis as OPSI has a higher risk of neurological complications, clinicians should consider longer and more cautious steroid tapering.

A Case Report of Deep Cerebral Venous Thrombosis Presenting Unilateral Lesion: The Association of Asymmetric Venous Outflow and Unilateral Lesion.

A 60-year-old man was admitted to our hospital due to progressive aphasia and right hemiparesis. Brain magnetic resonance imaging showed the left thalamus and basal ganglia lesion. Digital subtraction angiography showed the vein of Galen and straight sinus occlusion, suggesting cerebral venous thrombosis. Since his left transverse sinus was hypoplastic, his left deep cerebral lesion was due to the left deep cerebral vein congestion by the asymmetrical venous outflow. After anticoagulant therapy, his symptom and unilateral lesion improved. Clinicians should consider the vein of Galen and straight sinus thrombosis even in unilateral deep cerebral lesions.

Uremic Encephalopathy Presenting with Unilateral Destructive Leukoencephalopathy Successfully Treated with Hemodialysis.

An 81-year-old woman was hospitalized with progressive consciousness disturbance. Blood tests showed acidemia with severe renal dysfunction, and a cerebral spinal fluid (CSF) test showed pleocytosis with myelin basic protein (MBP) elevation. Brain magnetic resonance imaging showed unilaterally dominant subcortical white matter lesions with lentiform fork sign on T2-weighted imaging. After initiating hemodialysis, her consciousness disturbance and white matter lesions improved, suggesting uremic encephalopathy (UE). Unilaterally dominant leukoencephalopathy and high pleocytosis with MBP elevation in CSF are less common than previously identified characteristics of UE. When unilateral leukoencephalopathy occurs in patients with renal failure, UE should be considered.

Enteral tube nutrition for geriatric post-stroke dysphagia evaluation (ENGE) score to evaluate the risk of dysphagia after acute ischemic stroke.

BACKGROUND: Post-stroke dysphagia (PSD) is a common complication after stroke. Early PSD prediction is essential for patient stratification for intensive oral intake rehabilitation. We aimed to develop a PSD prediction score using clinical data obtained at admission. METHODS: We examined consecutive patients with acute ischemic stroke between 2018 and 2019. The dysphagia status 14 days after admission was assessed using the Functional Oral Intake Scale (FOIS). PSD was defined as FOIS 1-3, which represents tube-dependent nutrition. Using multivariable logistic regression analysis, we constructed the Enteral tube Nutrition for Geriatric post-stroke dysphagia Evaluation (ENGE) score. The discriminative performance of the ENGE score was analyzed by receiver operating curve analysis. The reproducibility of the ENGE score was validated using patient data in 2020. RESULTS: PSD developed in 84 of 488 patients (median age 78 years; 57% males). The ENGE score ranged from 0 to 6, with 1 point assigned for older age (≥78 years), 1 for high premorbid modified Rankin Scale (mRS) (≥1), 3 for high NIHSS score (≥12), and 1 for low serum albumin (<3.0 mg/dl). The area under the curve (AUC) of the ENGE score for discriminating PSD was 0.88 (95% confidence interval [CI] 0.83-0.92), and a score of 3 or more had a higher positive likelihood ratio. In the validation cohort, the AUC of the ENGE score for PSD was 0.85 (95% CI 0.78-0.91), which was similar to the derivation cohort (p = 0.491). CONCLUSIONS: The ENGE score predicts severe PSD after acute ischemic stroke with good reproducibility.

Rapid Evaluation of Large Vessel Occlusion for Mechanical Thrombectomy Using Carotid Duplex Ultrasound.

Objectives This study clarified the usefulness of carotid duplex ultrasound (CDU) in evaluating large vessel occlusion (LVO) in patients with acute stroke planned to be treated with mechanical thrombectomy (MT). Methods This study was single-center, prospective, observational trial. If the ratio of end-diastolic velocity in the common carotid arteries was ≥1.4, or diastolic flow in the affected internal carotid artery (ICA) was absent on CDU, patients were immediately transferred to the angio-suite without additional cerebrovascular imaging. Clinical parameters, including time metrics and outcomes, were evaluated in participants. Patients We enrolled stroke patients with a National Institutes of Health Stroke Scale score ≥6 and Alberta Stroke Program Early CT score ≥6 in whom MT could be initiated within 6 hours of the stroke onset. Results Among 140 patients screened during the study period, 48 were ultimately enrolled. Twenty-seven patients were diagnosed with LVO by CDU alone. CDU offered 83% sensitivity and 82% specificity for identifying the occlusion of the ICA or M1 segment of the middle cerebral artery. Among the 29 total patients treated with MT, 20 (67%) showed a modified Rankin Scale score ≤2 at 90 days. The door-to-puncture time was significantly shorter in patients evaluated by CDU alone (34 minutes) than in those evaluated by magnetic resonance angiography after CDU (47.5 minutes, p<0.001). Conclusion CDU might reduce the time metrics for early initiation of MT with good sensitivity and specificity in identifying LVO.

Low-dose intravenous recombinant tissue-type plasminogen activator therapy for patients with stroke outside European indications: Stroke Acute Management with Urgent Risk-factor Assessment and Improvement (SAMURAI) rtPA Registry.

BACKGROUND AND PURPOSE: The purpose of this study was to determine the safety and efficacy of intravenous recombinant tissue-type plasminogen activator (0.6 mg/kg alteplase) within 3 hours of stroke onset in Japanese patients outside the indications in the European license. METHODS: Of the 600 patients who were treated with recombinant tissue-type plasminogen activator, 422 met the inclusion criteria of the European license (IN group) and 178 did not (OUT group). RESULTS: The OUT group was inversely associated with any intracerebral hemorrhage (adjusted OR, 0.50; 95% CI, 0.29-0.84), positively associated with an unfavorable outcome (2.48; 1.55-3.94) and mortality (2.04; 1.02-4.04), and not associated with symptomatic intracerebral hemorrhage (0.53; 0.11-1.79) or complete independency (0.65; 0.40-1.03) after multivariate adjustment. CONCLUSIONS: Functional and vital outcomes 3 months after low-dose recombinant tissue-type plasminogen activator in patients outside the European indications were less favorable compared with those included in the indications; however, the risk of intracerebral hemorrhage was not.

Visibility of the lesser sphenoid wing is an important indicator for detecting the middle cerebral artery on transcranial color-coded sonography.

BACKGROUND: Failure to detect the sphenoidal segment of the middle cerebral artery (M1) on transcranial color-coded sonography (TCCS) results from either M1 occlusion or an insufficient temporal bone window (TBW). We sought to identify a simple indicator on B mode images for M1 evaluation. METHODS: Consecutive acute ischemic stroke patients with an intact M1 segment underwent prospective TCCS evaluation. Visibilities of the contralateral temporal bone (CTB), midbrain (MB) and lesser sphenoid wing (LSW) on B mode images were defined as follows: 'invisible', 'poor' if the contour was less than 50% visible, 'fair' if more than 50% visible and 'good' if totally visible. M1 detectability on color Doppler images was defined as follows: 'INVISIBLE', 'POOR' if the M1 was detected as color dots, 'FAIR' if linearly but discontinuously detectable, and 'GOOD' if linearly and continuously detectable. The relationship between each structure's visibility and M1 detectability was assessed. RESULTS: Seventy-six patients with 152 TBWs were evaluated. The CTB was 'invisible' in 2%, 'poor' in 22%, 'fair' in 36% and 'good' in 40%. Visibility of the MB was 36, 24, 26 and 14%, respectively. Visibility of the LSW was 16, 22, 29 and 32%, respectively. The M1 was 'INVISIBLE' in 51%, 'POOR' in 7%, 'FAIR' in 7% and 'GOOD' in 35%. Spearman's rank correlation coefficient between each structure's visibility and M1 detectability was 0.68 for the CTB, 0.66 for the MB and 0.80 for the LSW, respectively (p < 0.001 for all). CONCLUSION: Visibility of the LSW on B mode appears to be a better indicator than other structures for M1 evaluation.

Myelin Oligodendrocyte Glycoprotein Antibody-Associated Disease With False-Positive Results in SARS-CoV-2 Antigen Tests: A Case Report.

A 23-year-old man presented with headache, fever, and urinary retention. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antigen tests were positive, but SARS-CoV-2 polymerase chain reaction (PCR) results were negative. MRI showed long spinal cord lesions. Due to positive serum and cerebrospinal fluid myelin oligodendrocyte glycoprotein (MOG) antibodies, we made the diagnosis of MOG-associated disease. We concluded that the antigen tests were false positives because SARS-CoV-2 IgM and IgG were not elevated. Although the mechanism behind the false-positive results is unclear, physicians should consider the possibility of a false-positive result in the SARS-CoV-2 antigen test.