Left Parieto-occipital Region Research Articles

Burkitt lymphoma in a scalp region: a case report of it’s recurrence in a 13-year-old child

Introduction: Burkitt lymphoma (BL) is an aggressive non-Hodgkin lymphoma characterized by chromosome 8 MYC gene translocation. It manifests in three clinical types: immunodeficiency-related, sporadic (nonendemic), and endemic (African), each differing in epidemiology and clinical behavior. Treatment typically involves enrollment in clinical trials or intensive chemotherapy regimens like R-CODOX-M/IVAC. The authors present a case of recurrent BL following treatment. Case report: A 13-year-old female presented with a gradually progressive swelling in the left parieto-occipital region. Examination revealed normal vital signs and a Glasgow coma scale, with seronegative findings on investigations. An excision of a subganglion soft tissue tumor was performed, revealing histopathological features suggestive of a small round blue cell tumor. After chemotherapy, the patient experienced a recurrence in the scalp region, diagnosed as BL. Discussion: While scarce reports exist on BL in the scalp region, cases have been documented in various body locations. Treatment strategies, including chemotherapy and surgery, have shown promising results in managing the disease and improving symptoms. Conclusion: The recurrence of BL is rare, highlighting the importance of vigilance in monitoring patients post-treatment. The authors report a case of recurrent BL in a 13-year-old female, emphasizing the need for continued research and surveillance in managing this aggressive malignancy.

Comparative analysis of resting-state EEG-based multiscale entropy between schizophrenia and bipolar disorder

BackgroundStudies that use nonlinear methods to identify abnormal brain dynamics in patients with psychiatric disorders are limited. This study investigated brain dynamics based on EEG using multiscale entropy (MSE) analysis in patients with schizophrenia (SZ) and bipolar disorder (BD). MethodsThe eyes-closed resting-state EEG data were collected from 51 patients with SZ, 51 patients with BD, and 51 healthy controls (HCs). Patients with BD were further categorized into type I (n = 23) and type II (n = 16), and then compared with patients with SZ. A sample entropy-based MSE was evaluated from the bilateral frontal, central, and parieto-occipital regions using 30-s artifact-free EEG data for each individual. Correlation analyses of MSE values and psychiatric symptoms were performed. ResultsFor patients with SZ, higher MSE values were observed at higher-scale factors (i.e., 41–70) across all regions compared with both HCs and patients with BD. Furthermore, there were positive correlations between the MSE values in the left frontal and parieto-occipital regions and PANSS scores. For patients with BD, higher MSE values were observed at middle-scale factors (i.e., 13–40) in the bilateral frontal and central regions compared with HCs. Patients with BD type I exhibited higher MSE values at higher-scale factors across all regions compared with those with BD type II. In BD type I, positive correlations were found between MSE values in all left regions and YMRS scores. ConclusionsPatients with psychiatric disorders exhibited group-dependent MSE characteristics. These results suggest that MSE features may be useful biomarkers that reflect pathophysiological characteristics.

Neural tracking of natural speech in children in relation to their receptive speech abilities

Receptive speech is the ability to understand speech addressed to a person. It is a crucial process for a child’s cognitive development. We examine the relationship between receptive speech and neural tracking of natural speech in 52 children aged 3–8 years to infer the neurophysiological mechanisms underlying speech development. We registered a 32-channel electroencephalogram (EEG) while children listened to narrative audio stories. The temporal response function (TRF) approach was used to study neural tracking features at acoustic and semantic levels. We found a strong positive correlation between the TRF prediction accuracy values that demonstrate the magnitude of neural tracking, and receptive speech abilities measured by the Preschool Language Scales (PLS-5). Topographic analysis of these correlations showed significant clusters of EEG channels in the right temporal region for acoustic tracking, and in the left fronto-central and right parieto-occipital regions for semantic tracking. We assume that these results reflect the development of the brain systems necessary for speech comprehension. To sum up, we suggest that the TRF measures are easy-to-assess neurophysiological markers of receptive speech development in children.

Methotrexate Induced Central Nervous System Manifestations in Children Receiving Treatment for Acute Lymphoid Malignancies

Methotrexate (MTX) is an essential part of most chemotherapy regimens for acute lymphoblastic leukemia (ALL). It is administered intrathecally (IT), intravenously, and orally during ALL therapy. We performed a retrospective chart review to assess the central nervous system (CNS) manifestations induced by MTX in all children who received ALL therapy at our institution between July 2013 and June 2023. A list of patients with the ICD-9/10 codes for ALL or ALLy was obtained from the Electronic Medical Records for the study time period. Data collected included demographics, cytogenetics, laboratory test results, MTX pharmacological data if available, and details of the treatment of CNS manifestations attributable to MTX. Lastly, we had a single neuroradiologist re-review all the brain Magnetic Resonance Imaging (MRI) obtained in patients with MTX induced CNS manifestations. Sixty-five children were treated for ALL during the study decade. The average age at diagnosis was 4.7 ± 4 years. Our cohort consisted of 38 males and 27 females. Twelve of 65 patients (19%) developed MTX-induced CNS manifestations. The average age at the onset of symptoms was 5.3 ± 2 years. Ten patients had received a dose of IT MTX within 2 weeks of experiencing symptoms. Symptoms included raised intracranial pressure (ICP) (64%), headache (36%), confusion (36%), altered mental status (29%), and altered level of consciousness (29%). Treatment of MTX-induced CNS manifestations consisted of therapeutic drainage of cerebrospinal fluid (CSF) with their scheduled IT chemotherapy administration (65%), acetazolamide (57%), theophylline + leucovorin + dextromethorphan (64%), and addition of hydrocortisone with IT medications (36%). In 3 (25%) patients the subsequent doses of MTX were delayed. The symptoms of CNS manifestations resolved in 100% of cases and MTX was able to be readministered in all the patients. Only one patient had recurrence of CNS manifestations twice after rechallenging with MTX; however, with specific symptomatic treatment, was able to tolerate the remainder of the IT therapy inclusive of MTX. Brain MRIs were obtained in all patients. Initial imaging studies yielded normal results in 6 (50%) patients. Abnormal findings included subcortical white matter changes, vividly observed on T2/FLAIR MRI. These changes were represented by regions of acute hyperintensity seen in diffuse bilateral cerebral hemispheres (33%), parietal regions (33%), frontoparietal regions (17%), occipital regions (17%) and the left parietooccipital region (17%). A follow up MRI was performed 3 to 8 months after the initial MRI and was repeated up to 6 times over a course of 6 years in a patient. The earliest MRI improvement was evident after 3 months of initial imaging. About 20% of patients developed MTX induced CNS manifestations in our cohort. IT MTX was the most common culprit. Raised ICP, on opening pressure measured during IT procedures happened to be the most common finding. This has not widely been reported previously under MTX induced CNS complications in published data. One of the suspected etiologies is the inflammation of arachnoid villi impairing CSF drainage. These patients responded well to acetazolamide and therapeutic drainage of CSF. Finally subcortical while matter changes on T2/FLAIR MRI was a common CNS manifestation.

Visual event-related potentials reveal the early whole-word lexical processing of Chinese two-character words

Morphologically complex words are common across different languages, especially in Chinese, because more than 90% of common modern Chinese words are complex words. Many behavioral studies have suggested the whole-word processing of Chinese complex words, but the neural correlates of whole-word processing remain unclear. Previous electrophysiological studies revealed automatic and early (∼250 ms) access to the orthographic forms of monomorphic words in the ventral occipitotemporal area. In this study, we investigated whether there is also automatic and early orthographic recognition of Chinese complex words (as whole units) by recording event-related potentials (ERPs). A total of 150 two-character words and 150 two-character pseudowords composed of the same 300 characters (morphemes) were pseudorandomly presented to proficient Chinese readers. Participants were required to determine the color of each stimulus in the color decision task and to determine whether each stimulus was a word in the lexical decision task. The two constituent characters of each stimulus were horizontally arranged in Experiment 1 and vertically arranged in Experiment 2. The results revealed a significant early ERP difference between words and pseudowords approximately 250–300 ms after stimulus onset in the parieto-occipital scalp region. The early ERP difference was more prominent in the color decision task than in the lexical decision task, more prominent in Experiment 1 than in Experiment 2, and more prominent in the left parieto-occipital scalp region than in the right. Source analysis results showed that the early ERP difference originated from the left ventral occipitotemporal cortex. These results reflected early and automatic access to whole-word orthographic representations of Chinese complex words in the left ventral occipitotemporal cortex.

Hyperhomocysteinemia due to Vitamin B12 Deficiency with MTHFR Gene Mutation, an Atypical Metabolic Cause of Young Ischemic Stroke: A Case Report

Background: Vitamin B12 deficiency can impair the metabolism of homocysteine, leading to hyperhomocysteinemia that can cause thrombosis in the intracranial blood vessels resulting in a stroke. Case Presentation: A 15-year-old Muslim young boy initially presented with pallor, slurred speech, right facial weakness, and right-sided hemiplegia. On examination, he was found moderately anemic, nonicteric, and with right-sided stroke evidenced by hypertonia, reduced muscle power jerk exaggerated with extensor plantar response. There was no lymphadenopathy, bony tenderness, intellectual impairment, or organomegaly, and normal vital parameters with the unremarkable cardiovascular examination. Laboratory investigations revealed pancytopenia, with reduced Vit B12, folic acid, and moderately increased homocysteine level. Bone marrow study suggestive of megaloblastic anemia. Immunological, infectious screens; and prothrombotic markers were found negative. CT scan of the head revealed a hypodense lesion in the left parieto-occipital region, DWI sequence on MRI Brain revealed diffusion restriction in the same area while an MR angiogram of the Brain revealed occlusion of the left middle cerebral artery due to thrombus sparing a small segment after its origin. In addition, he had MTHFR c677 C>T (Methyl tetrahydrofolate reductase) gene mutation and responded both clinically and biochemically after vitamin B12, folic supplementation along with aspirin in 5 months. Conclusion: Vitamin B12 deficiency along with MTHFR c677 C>T gene mutation has increased the chance of thrombotic stroke. Vitamin B12 supplementation might be beneficial for patients with an MTHFR gene mutation positive. J MEDICINE 2023; 24: 51-55

Metastatic high-grade meningioma: A case report and review of risk factors for metastasis.

Abstract Meningiomas are the most common primary tumor of the CNS, and although they usually have a good prognosis, meningiomas can metastasize to extracranial sites, greatly worsening the prognosis. Due to its infrequency, the clinical and molecular risk factors associated with this event are poorly characterized in the literature. A 69-year-old man was found to have a meningioma in the left parieto-occipital parafalcine region. Over the subsequent decade, the patient experienced multiple local tumor recurrences, including with invasion through the scalp and superior sagittal sinus. The tumor was WHO grade 2-3 and next-generation sequencing was notable for TERT promoter mutation, homozygous deletion of CDKN2A, and high variant allele frequency of NF2. The tumor metastasized to the axial and appendicular skeleton, liver, kidney, and lung, and the patient ultimately succumbed to disease. In summary, this is the first report of multiple simultaneous and anatomically-distinct extracranial metastases from a primary intracranial meningioma.

Implicit motor imagery performance and cortical activity throughout the menstrual cycle

Studies show that female motor and visuospatial skills are modulated by the menstrual cycle. Implicit motor imagery, meaning the involuntary imagination of movements during a task, involves kinesthetic, visual, and spatial aspects of the corresponding action and can be investigated by using the hand laterality judgment task (HLJT). In this study we aimed to investigate whether implicit motor imagery performance and cortical activity are altered throughout the menstrual cycle, as demonstrated by motor skills in females. Thus, 31 healthy women underwent HLJT during the menstrual, follicular and luteal phases of their menstrual cycles. Right-handed participants had to recognize the laterality (right or left) of hands presented in different views (palm or back) and orientations on a computer screen. Test performance and EEG event-related potentials were analyzed. Participants performed better in the test in the follicular and luteal phases when compared to the menstrual phase, and the accuracy of the test was positively correlated with estradiol levels in the follicular phase. The difference between medial and lateral hand orientations for rotation-related negativity was significant in the medial and left parieto-occipital regions only in the follicular phase. These findings suggest positive modulating action of estradiol in performing implicit motor imagery.

A Case of Pembrolizumab (Anti-PD-1) Induced Encephalitis

Objective N/A. Background PD-1 Immune checkpoint inhibitors (ICI) have been associated with neurologic immune-related adverse events including meningoencephalitis and limbic encephalitis that can manifest as paraneoplastic syndromes. We present a case of suspected pembrolizumab (anti PD-1) induced limbic encephalitis presenting as episodic aphasia. Design/Methods N/A. Results A 62-year-old man with poorly differentiated papillary thyroid carcinoma with extensive brain, lung, lymphatic metastases post thyroidectomy, radioiodine therapy, chemotherapy with dabrafenib and trametinib, and stereotactic radiation surgery presented with recurrence of brain metastases one year after the diagnosis of a 2.1 cm metastatic lesion in the left parieto-occipital region causing right homonymous hemianopsia. The metastases initially improved in size and number with radiation and serial brain MRIs were stable. Biopsy of the mets revealed a poorly differentiated carcinoma. He was subsequently treated with pembrolizumab for six months. Two months after treatment initiation, he reported episodic behavioral arrest, confusion, and expressive aphasia concerning for seizures. Continuous EEG monitoring revealed a left-sided focus without seizures, and the episodes persisted despite levetiracetam and clobazam. Four lumbar punctures revealed lymphocytic pleocytosis (10-14 cells), elevated protein (48–68 mg/dl), negative cytology, flow cytometry and viral studies including JC virus. Paraneoplastic panels in serum and cerebrospinal fluid were negative. Repeat MRIs findings were most consistent with radionecrosis and noted improvement of the metastatic lesions. Suspicion was raised for pembrolizumab-induced encephalitis and he received high-dose steroids with minimal response however, clinical improvement noted with reduced episode frequency after intravenous immunoglobulin induction therapy and rituximab maintenance therapy. Conclusions PD-1 ICI-related encephalitis is a diagnosis of exclusion that should be considered in patients with encephalopathy or other neurological deficits following 3 months of treatment initiation and response to immunosuppressive therapy. Higher incidences are reported in males. Early recognition is crucial to prevent long-term neurologic damage. Outcomes are depend on patient characteristics and clinical presentation.

NCOG-38. PEMBROLIZUMAB (ANTI-PD-1) INDUCED LIMBIC ENCEPHALITIS PRESENTING AS EPISODIC APHASIA

Abstract PD-1 immune checkpoint inhibitors (ICI) have been associated with neurological immune-related adverse events including meningioencephalitis and limbic encephalitis that can manifest as paraneoplastic syndromes. We present a case of pembrolizumab (Anti-PD-1) induced limbic encephalitis presenting as episodic aphasia. A 62-year-old man with poorly differentiated papillary thyroid carcinoma with extensive brain, lung, lymphatic metastases, post total-thyroidectomy, radioiodine therapy, chemotherapy with dabrafenib and trametinib, and stereotactic radiation presented with recurrence of brain metastasis 1 year after diagnosis of a 2.1 cm metastatic lesion in the left parieto-occipital region. The metastases had initially improved in size and number with radiation, followed on serial MRI Brain - that were stable. Biopsy of recurrence revealed a poorly differentiated cancer. He was subsequently treated with pembrolizumab for 6 months for refractory carcinoma. Two months after treatment initiation, he reported episodic behavioral arrest, confusion, and expressive aphasia, initially concerning for seizures. Continuous EEG monitoring revealed non-epileptogenic left-sided foci and no seizures were captured. Patient empirically started on levetiracetam and clobazam - however, episodes persisted. Lumbar puncture revealed lymphocytic pleocytosis (10-14 cells), elevated protein (48-68 mg/dL), negative cytology, flow cytometry, and viral studies including JC virus. Paraneoplastic panel in serum and cerebrospinal fluid were negative. Repeat MRI findings were most consistent with radionecrosis and on contrary improvement of the previous metastatic lesions. This rose suspicion for pembrolizumab-induced encephalitis and he received high dose steroids with minimal response but great clinical improvement with IVIG and induction/maintenance therapy with rituximab. Marked reduction in aphasic episodes were noticed thereafter. PD-1 ICI-related encephalitis is diagnosis of exclusion that should be considered in patients with encephalopathy or neurological deficit following 3 months of treatment initiation and response to immunosuppressive therapy. Higher incidences reported in males. Early recognition is crucial to prevent long-term neurological damage. Outcomes depend on patient characteristics and timeline of presentation.

Meningioma – A spectrum of varied case presentations: A case series

Meningiomas are most common primary intracranial neoplasm. They arise from the arachnoid cap cells. They were previously divided into WHO grade I, grade II and grade III depending on their histological features and clinical features. However, in the new WHO 2021 updates it has been assigned a single group. Meningiomas may arise in the brain and spinal cord. An integrated approach based on clinical examination, history, radiology and histopathology aids in diagnosis. Herein we present a case series of a spectrum of clinico-pathological presentations of meningiomas. A 35-year-old female presented with headache. After clinical examination and on CT scan an intracranial lesion was noted. Craniotomy was performed and tissues examination was consistent with meningothelial meningioma. A 55-year-old female presented with pain in the limbs associated with weakness to the orthopaedics clinic. On neurological examination there was loss of power in the limbs. MRI spine revealed a round extramedullary intradural mass at T7 level. Laminectomy was done and histopathological examination showed features of Psammomatous meningioma, based on histomorphology and immunohistochemistry.A 32-year-old female presented to the Surgery clinics with dizziness and headache which was progressive and not responding to medications. MRI revealed an ovoid enhancing mass involving left parieto-occipital region, with a provisional diagnosis of meningioma. A report of Transitional meningioma was given based on histomorphology and immunohistochemistry. A 40-year-old female presented to the ophthalmic clinic with complaints of diplopia and disturbances in gait. Fundus examination revealed disc oedema and retinal vessel narrowing. MRI revealed large ovoid extra axial mass, with a provisional diagnosis of meningioma. A report of Secretory meningioma was signed out on histomorphology and immunohistochemistry.

Oncocytic Meningioma: Case Report of a Rare Meningioma Variant

AbstractOncocytic meningioma has been first identified in 1997 as a rare meningioma variant, composed predominantly of large meningothelial cells with abundant intracytoplasmic mitochondria. Here, we describe a 34-year-old male patient presenting with 2 weeks of progressive holocranial headache. Brain magnetic resonance imaging (MRI) revealed an extra axial solid-cystic expansive lesion in the left parieto-occipital parasagittal region, with intense vascularization. Histological and immunohistochemical analysis established the diagnosis. We also review briefly the pathological and radiological findings of this rare variant of meningioma as described in the literature.

POEMS Syndrome in a Patient with Castleman Disease: A Case Report

POEMS syndrome is a rare multisystem disorder that clinically manifests as a paraneoplastic syndrome and monoclonal plasma cell dyscrasia. Its acronym is derived from its principal characteristics: polyneuropathy, organomegaly, endocrinopathy, M proteins, and skin changes. Here, a case of POEMS syndrome was reported also having features of Castleman disease. A 43-year-old man was admitted with weakness of all four limbs, tingling, heaviness, muscle cramps along with headache for the last 6 months; examination revealed flaccid quadriparesis, generalized areflexia with flexor plantar response, papilloedema, cervical lymphadenopathy, hepatomegaly, tender mass at the left parieto-occipital region, pitting edema and testicular atrophy. Laboratory tests revealed thrombocytosis, high blood sugar, hepatomegaly, lytic lesions at the left parietal bone, pelvis, and intraosseous mass in the Pareto-occipital region; nerve conduction study showed the demyelinating motor neuropathy without conduction block. Intraosseous mass biopsy showed solitary plasmacytoma and immunohistochemical markers positive for CD138 and Ki- 67 MUM-1 and lambda/kappa >10:1, suggesting plasma cell dyscrasia with lambda chain restriction. Biopsy from the cervical lymph node revealed features of Castleman disease. With these clinical and laboratory parameters, this case was finally diagnosed as POEMS syndrome in association with Castleman disease which is a common accompaniment with the syndrome. J Bangladesh Coll Phys Surg 2022; 40: 204-208

Magnetization transfer imaging alterations and its diagnostic value in antipsychotic-naïve first-episode schizophrenia.

Magnetization transfer imaging (MTI) may provide more sensitivity and mechanistic understanding of neuropathological changes associated with schizophrenia than volumetric MRI. This study aims to identify brain magnetization transfer ratio (MTR) changes in antipsychotic-naïve first-episode schizophrenia (FES), and to correlate MTR findings with clinical symptom severity. A total of 143 individuals with antipsychotic-naïve FES and 147 healthy controls (HCs) were included and underwent 3.0 T brain MTI between August 2005 and July 2014. Voxelwise analysis was performed to test for MTR differences with family-wise error corrections. Relationships of these differences to symptom severity were assessed using partial correlations. Exploratory analyses using a support vector machine (SVM) classifier were conducted to discriminate FES from HCs using MTR maps. Model performance was examined using a 10-fold stratified cross-validation. Compared with HCs, individuals with FES exhibited higher MTR values in left thalamus, precuneus, cuneus, and paracentral lobule, that were positively correlated with schizophrenia symptom severity [precuneus (r = 0.34, P = 0.0004), cuneus (r = 0.33, P = 0.0006) and paracentral lobule (r = 0.37, P = 0.001)]. Whole-brain MTR maps identified individuals with FES with overall accuracy 75.5% (219 of 290 individuals) based on SVM approach. In antipsychotic-naïve FES, clinically relevant biophysical abnormalities detected by MTI mainly in the left parieto-occipital regions are informative about local brain pathology, and have potential as diagnostic markers.

PORENCEPHALIC CYST IN ADULTS : A RARE CASE WITH UNUSUAL PRESENTATION

Porencephalic cysts are rare conditions of cerebrospinal uid accumulation in the brain parenchyma that is usually related to perinatal vascular events, penetrating trauma and cranial surgery. These intracranial intraxial cysts communicating to either subarachnoid space or ventricles are mainly seen in paediatrics age group and very rarely in adults.We present a rare case of 26 year old female without any signicant past medical or surgical history presented to our emergency department in unconscious state following new onset generalized tonic clonic seizures on further evaluations with CT scan and MRI imaging of head. It revealed a large porencephalic cyst in left parieto-occipital region, hence we are reporting this case for its rarity and its consideration as differential for new onset seizure.

Acute Ischemic Stroke Due to Spontaneous Internal Carotid Artery Dissection in a Human Leukocyte Antigen (HLA) B27 Young Male

Carotid artery dissection is a significant cause of stroke in young patients. Here, we report a 33-year-old male who presented with right homonymous hemianopia and paresthesia of the right side of the body. Magnetic resonance imaging (MRI) of the brain revealed an acute infarct in the left parieto-occipital region. Magnetic resonance angiography (MRA) and duplex ultrasonography (USG) of the neck vessels suggested the left internal carotid artery dissection as the underlying cause. The patient was a known human leukocyte antigen (HLA) B27 and had a history of a previous attack of uveitis. This case report will raise awareness regarding the possible association of HLA B27 with the dissection of neck vessels.

The aggressive progression of primary intracranial atypical teratoid/rhabdoid tumor after surgical resection: A case report.

Introduction and importanceAtypical teratoid/rhabdoid tumor (AT/RT) is a rare and highly aggressive malignancy in children. Management of this aggressive tumor is associated with various diagnostic and therapeutic challenges. Maximum safe resection, followed by radiation therapy and multiagent chemotherapy, is the best course of treatment. This study aims to demonstrate the aggressive progression of the clinical presentation and radiographic features for an AT/RT after surgical resection.Case presentationWe reported a case of a 7-years-old girl with recurrent tumor mass in the left parieto-occipital region after performing craniotomy surgical resection. The tumor mass aggressively grew within a month after surgery.ConclusionAT/RT is a rare and highly progressive malignancy in the children population. This tumor aggressively grows after the first surgery. The INI-1 gene has been found as a diagnostic tumor marker in AT/RT. The characteristic of AT/RT is an absence of INI-1 staining in tumor cells. The treatment in AT/RT serves as palliative treatment, aiming to improve patient's quality of life. The poor prognosis is associated with MR imaging evidence of disseminated leptomeningeal tumor.

Endovascular embolization of the middle meningeal artery with the SQUID-18 non-adhesive embolic agent as a treatment for recurrent chronic subdural hematoma (a case report)

Objective: to report a case of recurrent chronic subdural hematoma treated using endovascular superselective embolization of the middle meningeal artery with the SQUID-18 non-adhesive embolic agent.Materials and methods. A 73-year-old male patient had an open head injury after own height falling. Multislice computed tomography demonstrated chronic subdural hematoma in the left parietooccipital region. The patient had surgery with a positive effect; however, 1 month postoperatively he developed recurrent hematoma. He was diagnosed with recurrent chronic subdural hematoma and underwent endovascular embolization of the distal branches of the middle meningeal artery with a non-adhesive embolic agent; repeated hematoma drainage was not required.Results. Follow-up multislice computed tomography performed 7 months postoperatively demonstrated total resorption of chronic subdural hematoma.Conclusion. This case illustrates the variety of methods that can be used for the treatment of chronic subdural hematoma and shows that endovascular embolization of the middle meningeal artery is a minimally invasive and effective procedure for such a disorder.

Large cavernous malformations in infant

Cavernous malformations are rare vascular malformations in the central nervous system. We present the case of a 2-month-old female patient who presented tonic-clonic seizures, with no previous history of seizures. Magnetic resonance imaging showed a 5.6 cm tumor in the left parieto-occipital region. The radiological aspect of the tumor initially suggested an anaplastic meningioma. After surgical treatment and anatomopathological analysis, it was found to be a cavernous malformation. Cavernous malformations, or cavernomas, are rare lesions and even more rare is the occurrence of large cavernomas. In the pediatric population, although still quite rare, they usually are presented as larger cavernomas. Surgical resection is considered the most effective treatment.

Impairment of auditory integration in subjective cognitive decline, amnestic mild cognitive impairment, and Alzheimer’s disease

AbstractBackgroundLocalization of sound sources in a noisy environment or ‘auditory scene analysis’ depends on central auditory processing (CAP) that is vulnerable in cognitive impairment. Here, we investigated the behavioral and electrophysiological characteristics of auditory integration, as a particular function in CAP, in relation to neuropsychological functions in SCD, aMCI, and AD.MethodWe introduced a binaural integration paradigm to measure sound‐localization‐related features (identification and retention of acoustic signals) by detecting break in interaural correlation (BIC) and primitive auditory memory (PAM) in wideband noises. We used a 128‐channel EEG to record the event‐related‐potential (peak amplitude, peak latency, and inter‐trial phase coherence [ITPC]) for the paradigm.ResultA total of 121 participants (mean age 65.9 years) were included. Significant differences in BIC detection and PAM were revealed between groups adjusting for age and gender (BIC: F = 20.2, P < 0.001; PAM: F = 24.6, P < 0.001). Post‐hoc analysis showed that BIC detection and PAM were significantly higher in NC or SCD groups compared with aMCI or AD groups. Further adjusting for neuropsychological scores, the significances were not changed, suggesting that auditory integration impairment was partially independent from top‐down cognitive functions. In EEG experiment, the most prominent differences in EEG metrics among the four groups included the ITPC of N1 at left parietooccipital region (F = 3.85, P = 0.012) and of P2 at left parietooccipital (F = 3.89, P = 0.011) and frontocentral regions (F = 8.09, P < 0.001). Notably, there was a linear decrease for the ITPC of N1 and a U‐shape‐curve change for the ITPC of P2 among the four groups, indicating that EEG patterns are differentially modulated depending on disease severity. For the discrimination of AD vs NC and MCI vs NC, the AUC was 0.92 and 0.85 for BIC detection; 0.94 and 0.90 for PAM, respectively.ConclusionAuditory integration, as a partially independent phenotype, is impaired in aMCI and AD populations. A U‐shape‐curve change of P2 with the increasing disease severity was found, indicating a compensation on auditory scene analysis. Results support binaural integration paradigm as a biomarker for screening cognitive decline and identifying auditory integration deficit.