VAMP1-Related Congenital Myasthenic Syndrome: A Case Report and Literature Review.

Congenital myasthenic syndrome-25 (CMS-25) is an autosomal recessive neuromuscular disorder caused by a homozygous mutation in VAMP1 gene. To date, only eight types of allelic variants in VAMP1 gene have been reported in 12 cases of CMS-25. Here, we report on an 8-year-old boy with motor developmental delay, axial hypotonia, myopathic face, muscle weakness, strabismus, ptosis, pectus carinatum, kyphoscoliosis, joint contractures, joint laxity, seizures, and recurrent nephrolithiasis. He also had feeding difficulties and recurrent aspiration pneumonia. Brain magnetic resonance imaging at 20 months of age showed left focal cerebellar hypoplasia. Genetic analysis revealed a homozygous missense variant of c.202C > T (p.Arg68Ter) in the VAMP1 gene. Treatment with oral pyridostigmine was started, which resulted in mild improvement in muscle strength. Salbutamol syrup was added a few months later, but no significant improvement was observed. This case report presents novel findings such as focal cerebellar hypoplasia and nephrolithiasis in VAMP1-related CMS-25. Consequently, this case report extends the clinical spectrum. Further studies are needed to expand the genotype-phenotype correlations in VAMP1-related CMS-25.

Correlation between early computed tomography findings and neurological outcome in pediatric traumatic brain injury patients.

Traumatic brain injury (TBI) is a leading cause of morbidity and mortality in children. Head computed tomography (CT) is frequently utilized for evaluating trauma-related characteristics, selecting treatment options, and monitoring complications in the early stages. This study assessed the relationship between cranial CT findings and early and late neurological outcomes in pediatric TBI patients admitted to the pediatric intensive care unit (PICU). The study included children aged 1 month to 18 years who were admitted to the PICU due to TBI between 2014 and 2020. Sociodemographic data, clinical characteristics, and cranial CT findings were analyzed. Patients were categorized based on their Glasgow Coma Scale (GCS) score. Of the 129 patients, 83 (64%) were male, and 46 (36%) were female, with a mean age of 6.8 years. Falls (n = 51, 39.5%) and in-vehicle traffic accidents (n = 35, 27.1%) were the most common trauma types observed. Normal brain imaging findings were found in 62.7% of the patients, while 37.3% exhibited intracranial pathology. Hemorrhage was the most frequent CT finding. Severe TBI (n = 26, p = 0.032) and mortality (n = 9, p = 0.017) were more prevalent in traffic accidents. The overall mortality rate in the study population was 10.1%. In children with TBI, cranial CT imaging serves as an essential initial method for patients with neurological manifestations. Particularly, a GCS score of ≤ 8, multiple hemorrhages, diffuse cerebral edema, and intraventricular bleeding are associated with sequelae and mortality.

Risk of seizure relapse and long-term outcomes after discontinuation of antiseizure medication in children with epilepsy.

OBJECTIVES: The aims of this study were to evaluate the demographic and clinical characteristics of children with epilepsy who discontinued their antiseizure medication (ASM), to determine potential predictors of seizure relapse, to calculate the rate of seizure relapse, and to detect long-term seizure outcomes. METHODS: A total of 269 seizure-free children with epilepsy who were decided to discontinue their ASM and were followed up for at least 18 months after ASM withdrawal were retrospectively evaluated. RESULTS: The enrolled children had been followed up for a median of 46 months (range 18-126 months; IQR: 29-61) after ASM withdrawal and 90 (33.5%) of their seizures relapsed. The median time to seizure relapse was 8 months (range 0.23-117 months; IQR: 2-25). Seizure relapse occurred in 16.7% of the 90 children at 1 month, 45.6% at 6 months, 62.2% at 1 year, 74.4% at 2 years, and 94.4% at 5 years. Univariate logistic regression analyses revealed six predictors significantly related to relapse: age at first seizure, age at diagnosis of epilepsy, intellectual disability, EEG findings after ASM withdrawal, ASM tapering time, and number of seizures on ASM. In multivariate logistic regression analyses, age at first seizure, intellectual disability, and ASM tapering time were not significantly associated anymore. The other three remained independently predictive. Pharmacological control of seizures with monotherapy was restored in 93.3% of the children with seizure relapse. CONCLUSION: This study evaluated potential predictors of seizure relapse, some of which have rarely been evaluated in previous studies. Adolescent age at diagnosis, abnormal EEG findings after ASM withdrawal, and high number of seizures on ASM were associated with a higher risk of seizure relapse. Abnormal MRI findings such as malformations of cortical development and hydrocephalus may be potential biomarkers for the risk of seizure relapse.

Evaluation of immunization status in patients with cerebral palsy: a multicenter CP-VACC study.

Children with chronic neurological diseases, including cerebral palsy (CP), are especially susceptible to vaccine-preventable infections and face an increased risk of severe respiratory infections and decompensation of their disease. This study aims to examine age-appropriate immunization status and related factors in the CP population of our country. This cross-sectional prospective multicentered survey study included 18 pediatric neurology clinics around Turkey, wherein outpatient children with CP were included in the study. Data on patient and CP characteristics, concomitant disorders, vaccination status included in the National Immunization Program (NIP), administration, and influenza vaccine recommendation were collected at a single visit. A total of 1194 patients were enrolled. Regarding immunization records, the most frequently administrated and schedule completed vaccines were BCG (90.8%), hepatitis B (88.9%), and oral poliovirus vaccine (88.5%). MMR was administered to 77.3%, and DTaP-IPV-HiB was administered to 60.5% of patients. For the pneumococcal vaccines, 54.1% of children received PCV in the scope of the NIP, and 15.2% of children were not fully vaccinated for their age. The influenza vaccine was administered only to 3.4% of the patients at any time and was never recommended to 1122 parents (93.9%). In the patients with severe (grades 4 and 5) motor dysfunction, the frequency of incomplete/none vaccination of hepatitis B, BCG, DTaP-IPV-HiB, OPV, and MMR was statistically more common than mild to moderate (grades 1-3) motor dysfunction (p = 0.003, p < 0.001, p < 0.001, p < 0.00, and p < 0.001, respectively). Physicians' influenza vaccine recommendation was higher in the severe motor dysfunction group, and the difference was statistically significant (p = 0.029).Conclusion: Children with CP had lower immunization rates and incomplete immunization programs. Clinicians must ensure children with CP receive the same preventative health measures as healthy children, including vaccines. What is Known: • Health authorities have defined chronic neurological diseases as high-risk conditions for influenza and pneumococcal infections, and they recommend vaccines against these infections. • Children with CP have a high risk of incomplete and delayed immunization, a significant concern given to their increased healthcare needs and vulnerability to infectious diseases. What is New: • Influenza vaccination was recommended for patients hospitalized due to pneumonia at a higher rate, and patients were administered influenza vaccine more commonly. • Children with CP who had higher levels of motor dysfunction (levels 4 and 5) were more likely to be overdue immunizations.

Seizure treatment with olfactory training: a preliminary trial.

OBJECTIVE: Epilepsy is a chronic condition characterized by recurrent seizures. Despite miscellaneous antiseizure medications, resistance to treatment is still approximately 30%. This resistance brings forward the multidisciplinary approach and complementary treatments. In this study, we aimed to investigate the effect of olfactory training on epileptic seizures with special aromas having antiseizure effects in patients diagnosed with drug-resistant epilepsy. METHODS: A total of 24 patients (14 pediatric and 10 adults) with drug-resistant epilepsy were recruited for the study. Participants were asked to inhale the standardized bottle filled with lavender aroma (Lavandula Angustifolia) twice a day (morning and evening) for 30-45 s (2 cm in front of nose; 10-15 s to right and left nostril and 10-15 s to both nostrils) for 3 months. The type, frequency, duration of seizures, the quality of life (SF-36 and PedsQL 4.0), and olfactory functions (Sniffin' Sticks Test and Pediatric Smell Wheel) were re-assessed. RESULTS: Statistical analysis showed that olfactory training decreased the seizure frequency (p < 0.001) and the seizure duration (p = 0.02). A global 50% seizure reduction was seen among patients. Moreover, olfactory training increased the quality of life (p = 0.003) and improved the olfactory function in both the pediatric and adult groups (p = 0.017, p = 0.05, respectively). There was no adverse reaction and no increase in seizure frequency. SIGNIFICANCE: The observations of the present investigation suggest that olfactory training is a successful complementary therapy with no adverse reaction in patients with drug-resistant epilepsy. Large cohort studies and longer follow-up periods are needed for providing olfactory training as a therapy modality in patients with epilepsy.

A Rare Pediatric Case of Severe Rhabdomyolysis Owing to Dual Infection.

AIM: We aimed to report a severe and rare pediatric rhabdomyolysis case associated with a dual viral infection. CASE: A 13 year-old, healthy girl presented with the complaints of fever, abdominal pain, weakness and dark-colored urine. She was diagnosed with rhabdomyolysis based on clinical signs and laboratory findings. The diagnosis was confirmed by serological tests and real-time polymerase chain reaction for Epstein-Barr virus (EBV) and cytomegalovirus (CMV), respectively. Other potential genetic, metabolic and infectious causes were evaluated meticulously but no evidence was found. This case is also important as it is the first reported case to our knowledge on rhabdomyolysis associated with EBV and CMV co-infection in children. CONCLUSION: The presented case experienced tetraplegia due to the severe muscular damage and muscle power returned to normal range after 3 months. This suggests that EBV and CMV may have exert synergistic effects leading to more severe inflammation and degeneration.

Levetiracetam monotherapy in children with epilepsy: Experience from a tertiary pediatric neurology center.

OBJECTIVES: Levetiracetam (LEV) is a second-generation antiepileptic drug with high efficacy and tolerability in children and adults with epilepsy. We aimed to retrospectively assess the long-term efficacy, tolerability, and safety of LEV monotherapy in children with epilepsy. METHODS: All patients who received LEV monotherapy at the Ankara University Children Hospital between January 2010 and June 2020 were evaluated. This retrospective pediatric cohort study determined the efficacy and safety of LEV monotherapy in 281 outpatients with epilepsy. RESULTS: There were 281 patients, 50.5% female, aged 5 months to 18 years with a mean age of 9 years. Of these, 48% of patients had idiopathic epilepsy, 40.6% had symptomatic epilepsy, and 11,4% had cryptogenic/genetic epilepsy. Primary generalized seizures occurred in 61.6% of patients, focal seizures in 19.6%, both generalized and focal seizures in 15,3%, focal to bilateral tonic-clonic seizures in 2.5%, and undefined type of seizure in 1.1%. A total of 22.8% patients had an accompanying extra neurological disease, mostly cardiological and hematological. The range of final daily dose was 10-71 mg/kg/day, with mean 29.5 mg/kg/day. Duration of therapy ranged from 7 days to 96 months, with median 12 months (IQR: 6-22). For the all cohort, a 6th month retention rate was 81%, a 12th month retention rate was 71.4%, and a 24th month retention rate was 61.8%. Eighty five percent of the patients had a seizure reduction of at least 50% and 55.9% of patients remained seizure-free for median 12 months treatment duration with LEV monotherapy. Improvement of electroencephalography (EEG) findings was found in 42% of patients on control EEGs. A total of 67 adverse events were documented in 45 (16%) patients. The most common adverse events were behavioral problems such as aggression (n:18) and irritability (n:17). The discontinuation rate due to adverse events was 2.5%, and due to inefficacy was 5.3%. CONCLUSION: The present study suggests that the high retention rates, high percentage of seizure reduction, the low discontinuation rate due to adverse events and inefficacy, and the relatively benign and transient profile of adverse events make LEV preferable as monotherapy in the pediatric population.

Hypomelanosis of Ito presenting with unilateral dilation of Virchow-Robin spaces: a case report.

Hypomelanosis of Ito is a rare heterogeneous neurocutaneous disorder often associated with central nervous and musculoskeletal system involvement. Herein, we report the first case of hypomelanosis of Ito in the literature presenting with unilateral dilation of Virchow-Robin spaces (VRS). A girl aged 16 years old presented with a 1-year history of headache. Her physical and neurological examinations were normal, except for the presence of unilateral cutaneous macular hypopigmented whorls and streaks on lower side of the right trunk and lower limb, termed as Blaschko's lines. She had mild deficits in cognitive and adaptive functioning. Hearing, renal, dental, ophthalmologic, metabolic, and cardiac assessments were normal. Brain magnetic resonance imaging (MRI) showed markedly unilateral hemispheric enlarged VRS without contrast enhancement and diffusion restriction. To the best of our knowledge, our case is the first report describing the unilateral hemispheric enlarged VRS in a patient with hypomelanosis of Ito. Our report suggested that hypomelanosis of Ito may have unilateral dilation of VRS in brain MRI.

Hashimoto's encephalopathy presenting as pseudobulbar palsy.

INTRODUCTION: Hashimoto's encephalopathy (HE) is an autoimmune condition with varied neurological and psychiatric features. HE is very unusual as a cause of pseudobulbar palsy (PSP). CASE PRESENTATION: A 14-year-old male was admitted with right-sided weakness, dysphagia, speech disorder, and aggressiveness. Brain magnetic resonance imaging showed increased intensity in bilateral temporal, insular cortex, amygdala, and parahippocampal area on T2-weighted and fluid-attenuated inversion recovery images. Autoimmune encephalitis was considered as the patient had subacute onset of psychiatric and motor disturbances with normal findings for cerebrospinal fluid. N-methyl-D-aspartate receptor, anti-glutamate-type α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid 1 and 2, anti-contactin-associated protein-like 2, anti-gamma-aminobutyric acid receptor, anti-Leucine-rich, and glioma-inactivated 1 antibodies were negative but the anti-thyroperoxidase (antiTPO) level was greater than 998 IU/ML (n:0-9). Steroid therapy was initiated as pulse therapy and maintained with 2-mg/kg/day dose with the diagnosis of HE. He was symptom free for 6 months. In the follow-up period, he had two recurrences which responded to steroid therapy. CONCLUSION: The common causes of PSP are demyelinating, vascular, and motor neuron diseases and congenital malformations of the opercular or insular cortex. However, there are no cases of PSP developing after any autoimmune encephalitis. This case highlights the importance of early detection of antiTPO antibodies with the findings of PSP due to autoimmune encephalitis.

Late Presentation of Ataxia, Areflexia, and Electrophysiological Abnormalities as Part of Miller Fisher Syndrome: Case Report.

Miller Fisher syndrome (MFS) is characterised by the triad of ophthalmoplegia, ataxia, and areflexia. A case with external ophthalmoplegia and absence of ataxia and areflexia until the end of second week is presented. Electrophysiological findings became apparent after the third week and showed reduced amplitudes of sensory nerve action potentials and prolonged latencies of F with no evidence of conduction blocks. There was no response to intravenous immunoglobulin, but there was response to corticosteroids. This case may represent an atypical MFS with late presenting electrophysiological abnormalities. Corticosteroids can be a therapeutic option when intravenous immunoglobulin fails to control clinical symptoms.

Panayiotopoulos syndrome: a case series from Turkey.

The aim of the study was to evaluate the demographic, clinical, and EEG characteristics of patients with Panayiotopoulos syndrome (PS) and the course of their illness. Thirty-eight patients followed up with a diagnosis of PS between January 2011 and December 2013 were evaluated. We found high rates of personal history of febrile convulsions, breath-holding spells, and family history of febrile convulsions, afebrile convulsion/epilepsy, migraine, and breath-holding spells. Seizures started before the age of eight in 87% of the patients, and the mean age at seizure onset was 4.6 years. Seizures were sleep-related in 81.5%, and autonomic status was seen in a third of the patients. The number of seizures was between 2 and 10 in 66% of the patients. The most common symptoms were ictus emeticus, eye/head deviation, and altered consciousness. Rolandic features were seen in 26% of the patients, and visual symptoms in 5%. Multifocal epileptiform discharges on EEG were identified in 84% of the patients. Two or more antiepileptic drugs were required in only 13% of the patients. Evolution to electrical status epilepticus in sleep and Gastaut-type epilepsy were seen in patients with more than ten seizures. The high rates of febrile convulsions, afebrile convulsions/epilepsy, migraine, and breath-holding spells in the patients and families suggest the importance of genetic factors and, perhaps, a common pathogenesis. However, the high rates of febrile convulsions and breath-holding spells in patients can be related to a misdiagnosis because of the similar symptoms. Despite its disturbing symptoms, PS is a benign epileptic syndrome requiring multiple antiepileptic drug use only in a small proportion of patients.

Management of neurological problems in children on home invasive mechanical ventilation.

INTRODUCTION: Home invasive mechanical ventilation (HIMV) has become a crucial long-term respiratory support for children with neurological disorders, but requires advanced technological skills and 24-h care. The increasing global population of children on HIMV is attributed to advancements in intensive care and improved survival rates. METHOD: The manuscript will review the most common neurological problems encountered in children on HIMV. CONCLUSION: The manuscript emphasizes the multidisciplinary nature of managing these patients, involving pediatric pulmonologists, pediatric neurologists, pediatric intensivists, nurses, therapists, dietitians, psychologists, and caregivers. The manuscript outlines the challenges posed by neurological disorders, such as spinal muscular atrophy, muscular dystrophy, cerebral palsy, spinal cord injuries, and neurodegenerative disorders, which may result in respiratory muscle weakness and impaired ventilation. The importance of individualized assessments, appropriate ventilator mode and equipment selection, training of caregivers, airway clearance techniques, nutritional support, regular follow-up visits, psychological and educational support, and addressing specific neurological issues such as involuntary movement disorders, prolonged seizures, sleep disorders, pain, sialorrhea, and immobilization-related complications are discussed. The treatment options for these specific challenges are outlined. This review highlights the complex nature of managing children with neurological disorders on HIMV and the importance of a collaborative approach among healthcare professionals and caregivers to optimize care and improve the quality of life for these children.

Investigating the Impact on Long-Term Outcomes and the Necessity of Hereditary Thrombophilia Screening in Presumed or Perinatal Arterial Ischemic Stroke.

This study aimed to investigate the influence of prothrombotic risk factors on long-term outcomes of patients with perinatal arterial ischemic stroke. The study was conducted through an analysis of monitoring results that were regularly maintained for approximately 20 years at a tertiary stroke-monitoring center. The study assessed prothrombotic risk factors, radiological area of involvement, clinical presentation, treatments, clinical outcomes, and long-term outcomes of the 48 patients included in the study, with a mean monitoring time of 77.6 ± 45.7 months (range: 6-204). Our results showed that the presence of prothrombotic risk factors did not affect long-term outcomes. However, patients with middle cerebral artery infarction had the highest risk of developing cerebral palsy, whereas those with presumed stroke had the highest risk of developing epilepsy. This study suggests that prothrombotic risk factors should not be evaluated during the acute stage unless there is a strong suspicion of the patient's history, and prevention or early diagnosis of presumed stroke patients will positively impact their long-term prognosis.

Predictors of medical intractability in children with epilepsy onset during the first two years of life, excluding infantile epileptic spasm syndrome.

PURPOSE: Early childhood epilepsy presents a significant challenge, with approximately 30 % of individuals experiencing treatment failure. This study aimed to identify predictors of medical intractability in children with epilepsy onset during the first two years of life, excluding infantile epileptic spasm syndrome. METHODS: A total of 323 children were retrospectively evaluated. The analyses included a review of medical records for demographic, laboratory, radiological, and electroencephalographic (EEG) findings. Children were diagnosed with drug-resistant epilepsy (DRE) according to the ILAE diagnostic criteria. Twenty-one potential prognostic predictors were examined in relation to medical intractability. RESULTS: Among the 323 children (56.7 % male), 119 (36.8 %) had unknown epilepsy, 131 (40.6 %) had structural epilepsy, 53 (16.4 %) had genetic epilepsy, and 20 (6.2 %) had metabolic epilepsy. Over a median follow-up of 68 months, 55.4 % of the children achieved ≥6 months of seizure freedom, 33.1 % developed DRE, and the remaining 11.5 % had rare ongoing seizures but did not meet the criteria for DRE because they were only treated with one antiseizure medication at the last follow-up. Univariate logistic regression analyses identified ten risk factors significantly associated with DRE. Multivariate logistic regression analyses revealed that the presence of developmental delay at epilepsy onset (p = 0.000; OR 7.890; 95 %CI 2.713 to 22.945), history of status epilepticus (p = 0.000; OR 8.247; 95 %CI 3.619 to 18.793), number of antiseizure medications (ASMs) at the sixth month of diagnosis (p = 0.000; OR 20.585; 95 %CI 8.993 to 47.117), and initial EEG findings (p = 0.046; OR 2.366; 95 %CI 1.015 to 5.518) were predictors of medical intractability. Nineteen (5.9 %) children died during follow-up for various reasons, including progressive neurogenetic or neurodegenerative disorders. CONCLUSION: Developmental delay at epilepsy onset, a history of status epilepticus, the use of two or more ASMs in the sixth month of diagnosis, and abnormal initial EEG findings were associated with medical intractability.

Metabolic etiologies in children with infantile epileptic spasm syndrome: Experience at a tertiary pediatric neurology center.

OBJECTIVE: Infantile epileptic spasm syndrome (IESS), including West syndrome (WS) and infantile spasm (IS), causes a challenging prognosis, particularly when associated with metabolic etiologies. METHODS: This study, conducted at a tertiary pediatric neurology center, explored the prevalence and clinical features of inborn errors of metabolism in 112 children with IESS over 10 years. RESULTS: Most patients presented with seizures, primarily flexor spasms, and the median age at onset was 5 months. Comprehensive clinical evaluation and neuroimaging revealed structural-acquired causes as the most common etiology. Notably, inborn errors of metabolism were identified in 5.4 % of cases, with six distinct diagnoses including nonketotic hyperglycinemia, pyridoxine-dependent epilepsy, primary coenzyme Q10 deficiency 7, congenital disorder of glycosylation type IIM, 6-pyruvoyl tetrahydrobiopterin synthase deficiency, and argininosuccinate lyase deficiency. The prevalence of inborn errors of metabolism in this cohort was consistent with global variations reported in the literature. Genetic testing, including karyotype analysis and whole exome sequencing, was performed in a subset of cases with no clear diagnosis, revealing abnormalities in approximately 50 % of cases. Adrenocorticotropic hormone emerged as the most frequently prescribed antiseizure medication. CONCLUSION: This study provides insight into the diagnostic challenges associated with IESS and highlights the importance of metabolic investigations, especially in cases without a clear etiology. The findings emphasize the need for further genetic and metabolic studies to enhance prognostic accuracy and guide potential treatment options for children with IESS, particularly in populations with high rates of consanguinity.

Is Ultrasonography a Reliable Approach for the Evaluation of Carpal Tunnel Syndrome in Patients With Mucopolysaccharidosis?

BACKGROUND: One of the most common causes of carpal tunnel syndrome (CTS) in childhood is mucopolysaccharidosis (MPS). While ultrasonography (US) can aid in the diagnosis of CTS in adult patients, there is limited experience of this in the pediatric group. We aimed to investigate the results of wrist ultrasonography, which may be a candidate alternative to electrophysiological examination. METHODS: The participants were evaluated for symptoms, physical examination findings, electrophysiological tests and grayscale US. CTS was diagnosed in accordance with the American Academy of Orthopedic Surgeons Management of Carpal Tunnel Syndrome: Evidence-Based Clinical Practice Guideline. RESULTS: Included in the study were 27 MPS patients aged 4.5-32 years and 30 healthy control subjects aged 4.3-26 years. Of the 54 wrists in the MPS group, 30 were diagnosed with CTS. The median cross-sectional area (CSA) at the proximal carpal tunnel, the CSA at the forearm, and the wrist-forearm ratio (WFR) were higher in the wrists of the MPS with CTS group than in those without CTS and the healthy control subjects. The WFR cutoff of ≥1.35, 56.6% (95% CI: 437.4-74.5) sensitivity, and 89.8% (95% CI: 81.0-95.5) specificity were consistent with a diagnosis of CTS (receiver operating characteristics analysis, area under the curve = 0.775, 95% CI: 0.673-0.877). CONCLUSION: Although the US provides results with unsatisfactory specificity and sensitivity, it is a candidate for further investigation for the diagnosis of CTS because it is an innovative, noninvasive, and more accessible method. WFR value may produce more meaningful results than wrist or forearm nerve area measurements.

A Case of Multidrug-Resistant Lance-Adams Syndrome Successfully Treated With Phenobarbital.

OBJECTIVE: Lance-Adams syndrome is a rare but devastating disorder characterized by rest, action, and stimulus-sensitive myoclonus after cardiorespiratory arrest. We aimed to present a case of multidrug-resistant Lance-Adams syndrome that was successfully treated with oral phenobarbital therapy. METHOD AND RESULTS: We report a previously healthy 11-year, 6-month-old boy was referred to our pediatric intensive care unit because of severe hypoxic ischemic brain injury due to sudden cardiorespiratory arrest. On the 15th day of hospitalization, he developed myoclonic jerks involving his limbs, trunk, and eyes. Despite many antiseizure medications in different combinations, myoclonic jerks persisted. Then, phenobarbital was started, and myoclonic jerks disappeared the next day. At the final evaluation, additional phenobarbital treatment was continued for 6 months and the patient remained myoclonus-free during this time. CONCLUSIONS: To the best of our knowledge, this case is the first report describing significant improvement with phenobarbital in a patient with multidrug-resistant Lance-Adams syndrome. We suggest that phenobarbital is an effective option and should be kept in mind in patients with multidrug-resistant Lance-Adams syndrome.

Ketogenic diet-responsive drug-resistant epilepsy in a case of asparagine synthetase deficiency with a novel compound heterozygous missense variant.

Asparagine synthetase deficiency (ASNSD) is a rare autosomal recessive neurometabolic disorder caused by homozygous or compound heterozygous mutations in the ASNS gene. Most of the patients have early-onset intractable seizures. A 7-year-old boy was first admitted to our clinic with intractable febrile and afebrile seizures that started when he was 6 months old. He had axial hypotonia with spastic quadriparesis, mild facial dysmorphism, and acquired microcephaly at 1 year-old. Metabolic tests showed a borderline-low serum asparagine level. The electroencephalogram demonstrated epileptic discharges with a high incidence of multifocal spike-wave activity. Brain MRI showed mild cerebral atrophy. His seizures continued despite combinations of multiple antiseizure agents. Whole-exome sequencing (WES) revealed a novel compound heterozygous missense variant of the ASNS gene, and the variants were confirmed by Sanger sequencing. He was started on a ketogenic diet at five years and six months of age. In the first month of the ketogenic diet, we observed that the frequency of seizures significantly decreased. He showed a remarkable improvement in seizures and milder improvement in cognitive skills. To our knowledge, our case is the first report describing significant improvement with a ketogenic diet in intractable seizures due to ASNSD.

Chronic inflammatory demyelinating polyradiculoneuropathy associated with Sjögren`s syndrome in a child.

BACKGROUND: Chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) is a peripheral nervous system disease associated with polyautoimmunity. CASE: We report a previously healthy 13-year old boy who was referred to our outpatient clinic with gait disturbance and distal lower limb weakness that had been increasing for six months. The patient had decreased deep tendon reflexes in the upper extremities and absence in the lower extremities, reduced muscle strength in the distal and proximal lower extremities, muscle atrophy, drop foot, and normal pinprick sensations. The patient was diagnosed with CIDP as a result of clinical findings and electrophysiological studies. Autoimmune diseases and infectious agents were investigated in terms of triggering CIDP. Although there was no clinical sign other than polyneuropathy, he was also diagnosed with Sjögren`s syndrome due to positive antinuclear antibodies and antibodies against Ro52, and with autoimmune sialadenitis. After six months of monthly intravenous immunoglobulin and oral methylprednisolone treatments, the patient was able to dorsiflex his left foot and walk without support. CONCLUSIONS: To our knowledge, our case is the first pediatric case with the coexistence of Sjögren`s syndrome and CIDP. Therefore, we suggest investigating children with CIDP in terms of underlying autoimmune diseases such as Sjögren`s syndrome.

Clinical and Imaging Clues of Arteriopathy-Related Pediatric Arterial Ischemic Stroke: A Single Center Experience.

Background and Purpose: Arteriopathy is a common etiology for childhood arterial ischemic stroke (AIS). In this study, we aimed to address clinical, demographic, and neuroimaging characteristics and the reversibility of vasculopathy in patients with childhood stroke due to arteriopathy by classifying them according to Childhood AIS Standardized Classification and Diagnostic Evaluation (CASCADE) criteria. Methods: We included 15 patients with AIS due to arteriopathy presented between 2013 and 2018. All patients were diagnosed and followed up using magnetic resonance imaging (MRI) studies. All acute AIS patients were classified by acute CASCADE criteria (1-4). Moreover, each group was categorized according to the chronic CASCADE criteria, including progressive, stable, reversible, and indeterminate courses. Results: In the study population, CASCADE 2 patients were the most common group, and basal ganglia involvement was the most common involvement in CASCADE 2 patients. Of CASCADE 2 patients, 71.4% received steroids, which was compatible with a favorable outcome. In the study, trauma was present in 33.3% of patients, 60% of which was related to CASCADE 4. In the control visit on month 24, there were neuromotor sequelae of 60%, including hemiparesis, facial paralysis, and decreased fine motor skills; furthermore, the recurrence rate was 20%. Conclusion: We strongly emphasize that arteriopathy should be kept in mind in school-age children presenting with hemiparesis and headache. Moyamoya disease must be considered in the differential diagnosis with anterior circulation involvement, while focal cerebral arteriopathy (FCA) in patients with basal ganglia involvement was detected on MRI and dissection in the patients with a history of head-neck injury. We think that steroids have positive influences on neurologic prognosis in patients with FCA.