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Pediatric Neurosurgery 2019The purpose of this study was to explore the clinical features and risk factors of outcomes in pediatric posterior cranial fossa ependymoma. We aim to provide...
OBJECTIVE
The purpose of this study was to explore the clinical features and risk factors of outcomes in pediatric posterior cranial fossa ependymoma. We aim to provide evidence-based recommendations for the improvement of prognoses.
PATIENTS AND METHODS
The clinical data, treatment modalities, approaches performed, recurrence rates and times, as well as the outcomes of 94 cases were analyzed retrospectively. The characters of neuroimaging were further studied.
RESULTS
In data from the most recent follow-up, 27 cases had tumor recurrence. The time for tumor recurrence was 13.7 ± 7.7 months. The estimated overall survival and progression-free survival, based on Kaplan-Meier analysis, was 42.2 ± 2.9 months and 38.7 ± 3.4 months, respectively. Univariate analysis showed that being free of recurrence is closely related to the high tumor sphericity (p = 0.018), homogeneity of tumor texture (p = 0.001), and gross total resection (GTR; p < 0.001). Mortality is linked to low sphericity (p = 0.017) and brain stem edema (p = 0.005). Cerebellar mutism is correlated with posterosuperior compression of the 4th ventricle roof by the tumor. The incidence rate of cerebellar ataxia, cerebellar mutism, and cerebellar dysarthria is related to the rostral extension of the tumor within the 4th ventricle. The recurrence rate is higher in subtotal resection (STR) than in GTR, and the difference is significant (p < 0.001). Although there is no significant difference between the recurrence rates in the three types, an earlier recurrence is prone with tumors located in the paramidline-lateral compared to the midline (p = 0.021) and paramidline-medial areas (p = 0.042).
CONCLUSIONS
Based on our data, GTR is indicated as the most optimal choice. Recurrence is linked to lower tumor sphericity, inhomogeneous tumor texture, and STR/partial resection. Tumor located on the lateral side might be prone for an early recurrence.
Topics: Adolescent; Child; Child, Preschool; Cranial Fossa, Posterior; Ependymoma; Female; Follow-Up Studies; Humans; Infant; Male; Prognosis; Retrospective Studies; Skull Base Neoplasms; Treatment Outcome
PubMed: 30699434
DOI: 10.1159/000495809 -
Critical Care Medicine May 2000OBJECTIVE, PATIENTS, AND METHODS: A severe case of cerebral air embolism after unintentional central venous catheter disconnection was the impetus for a systematic... (Review)
Review
UNLABELLED
OBJECTIVE, PATIENTS, AND METHODS: A severe case of cerebral air embolism after unintentional central venous catheter disconnection was the impetus for a systematic literature review (1975-1998) of the clinical features of 26 patients (including our patient) with cerebral air embolism resulting from central venous catheter complications.
RESULTS
The jugular vein had been punctured in eight patients and the subclavian vein, in 12 patients. Embolism occurred in four patients during insertion, in 14 patients during unintentional disconnection, and in eight patients after removal and other procedures. The total mortality rate was 23%. Two types of neurologic manifestations may be distinguished: group A (n = 14) presented with encephalopathic features leading to a high mortality rate (36%); and group B (n = 12) presented with focal cerebral lesions resulting in hemiparesis or hemianopia affecting mostly the right hemisphere, with a mortality rate as high as 8%. In 75% of patients, an early computed tomography indicated air bubbles, proving cerebral air embolism. Hyperbaric oxygen therapy was performed in only three patients (12%). A cardiac defect, such as a patent foramen ovale was considered the route of right to left shunting in 6 of 15 patients (40%). More often, a pulmonary shunt was assumed (9 of 15 patients; 60%). For the remainder, data were not available.
CONCLUSION
When caring for critically ill patients needing central venous catheterization, nursing staff and physicians should be aware of this potentially lethal complication.
Topics: Aged; Akinetic Mutism; Catheterization, Central Venous; Coronary Artery Bypass; Embolism, Air; Hemiplegia; Hospital Mortality; Humans; Hyperbaric Oxygenation; Intracranial Embolism; Jugular Veins; Male; Neurologic Examination; Subclavian Vein; Survival Rate; Tomography, X-Ray Computed
PubMed: 10834723
DOI: 10.1097/00003246-200005000-00061 -
European Journal of Paediatric... Jan 2024Children who underwent posterior fossa tumor removal may have spoken or written language impairments. The present systematic review synthesized the literature regarding... (Review)
Review
BACKGROUND
Children who underwent posterior fossa tumor removal may have spoken or written language impairments. The present systematic review synthesized the literature regarding the language outcomes in this population. Benefits of this work were the identification of shortcomings in the literature and a starting point toward formulating guidelines for postoperative language assessment.
METHODS
A systematic literature search was conducted, identifying studies with patients who had posterior fossa surgery before 18 years of age. Included studies were narratively synthesized to understand language outcomes by language function (e.g., phonology, morphosyntax) at a group and individual level. Furthermore, the influence of several mediators (e.g., postoperative cerebellar mutism syndrome (pCMS), tumor type) was investigated. A critical evaluation of the language assessment tools was conducted.
RESULTS
The narrative synthesis of 66 studies showed that a broad spectrum of language impairments has been described, characterized by a large interindividual heterogeneity. Patients younger at diagnosis, receiving treatment for a high-grade tumor and/or radiotherapy and diagnosed with pCMS seemed more prone to impairment. Several gaps in language assessment remain, such as a baseline preoperative assessment and the assessment of pragmatics and morphosyntax. Further, there were important methodological differences in existing studies which complicated our ability to accurately guide clinical practice.
CONCLUSION
Children who had posterior fossa surgery seem to be at risk for postoperative language impairment. These results stress the need for language follow-up in posterior fossa tumor survivors.
Topics: Child; Humans; Postoperative Complications; Brain Neoplasms; Infratentorial Neoplasms; Cerebellar Diseases; Neurosurgical Procedures; Mutism; Cerebellar Neoplasms
PubMed: 38377646
DOI: 10.1016/j.ejpn.2023.12.005 -
Neurosurgical Review Apr 2024Segmentation tools continue to advance, evolving from manual contouring to deep learning. Researchers have utilized segmentation to study a myriad of posterior...
BACKGROUND
Segmentation tools continue to advance, evolving from manual contouring to deep learning. Researchers have utilized segmentation to study a myriad of posterior fossa-related conditions, such as Chiari malformation, trigeminal neuralgia, post-operative pediatric cerebellar mutism syndrome, and Crouzon syndrome. Herein, we present a summary of the current literature on segmentation of the posterior fossa. The review highlights the various segmentation techniques, and their respective strengths and weaknesses, employed along with objectives and outcomes of the various studies reported in the literature.
METHODS
A literature search was conducted in PubMed, Embase, Cochrane, and Web of Science up to November 2023 for articles on segmentation techniques of posterior fossa. The two senior authors searched through databases based on the keywords of the article separately and then enrolled joint articles that met the inclusion and exclusion criteria.
RESULTS
The initial search identified 2205 articles. After applying inclusion and exclusion criteria, 77 articles were selected for full-text review after screening of titles/abstracts. 52 articles were ultimately included in the review. Segmentation techniques included manual, semi-automated, and fully automated (atlas-based, convolutional neural networks). The most common pathology investigated was Chiari malformation.
CONCLUSIONS
Various forms of segmentation techniques have been used to assess posterior fossa volumes/pathologies and each has its advantages and disadvantages. We discuss these nuances and summarize the current state of literature in the context of posterior fossa-associated pathologies.
Topics: Humans; Arnold-Chiari Malformation; Cranial Fossa, Posterior; Magnetic Resonance Imaging
PubMed: 38637466
DOI: 10.1007/s10143-024-02366-4 -
General Hospital Psychiatry 2020To ascertain the phenomenological characterisation of catatonia in N-methyl-d-aspartate receptor antibody encephalitis (NMDAr-AbE).
OBJECTIVE
To ascertain the phenomenological characterisation of catatonia in N-methyl-d-aspartate receptor antibody encephalitis (NMDAr-AbE).
METHODS
A systematic review of case reports was undertaken in accordance with PRISMA guidelines. Case reports of NMDAr-AbE containing sufficient information on the cases' clinical presentation and meeting the study's inclusion criteria were selected. Cases were searched for clinical data in keeping with core catatonic signs by applying the screening instrument of the Bush-Francis Catatonia Rating Scale. When two or more core signs were ascertained catatonia was considered to be present.
RESULTS
2645 records were identified through the database search. Following screening and application of eligibility/inclusion criteria 139 articles were selected reporting on 189 individual subjects. Catatonia was present in 60% of these cases. The most prevalent signs were immobility/stupor (70%), mutism (67%), excitement (50%), posturing/catalepsy (34%), stereotypies (31%), and rigidity (30%). Immobility/stupor and excitement co-occurred in the same patient in 33% of cases.
CONCLUSION
The phenomenological profile of catatonia in this sample of cases of NMDAr-AbE was characterised by a preponderance of signs in the hypokinetic spectrum. However, excitement often co-occurred in these patients suggesting that fluctuations in catatonic semiology may be frequent.
Topics: Anti-N-Methyl-D-Aspartate Receptor Encephalitis; Catatonia; Humans
PubMed: 32070914
DOI: 10.1016/j.genhosppsych.2020.01.002 -
Psychiatry and Clinical Neurosciences May 2019The aim of this study was to improve early recognition of anti-N-methyl-d-aspartate receptor encephalitis (anti-NMDArE) in children and adolescents by identifying...
AIM
The aim of this study was to improve early recognition of anti-N-methyl-d-aspartate receptor encephalitis (anti-NMDArE) in children and adolescents by identifying characteristic temporal patterns of clinical features in patients likely to be referred for psychiatric evaluation. In this form of autoimmune encephalitis, NMDAr hypofunction is caused by autoantibodies to receptor surface components. Clinical outcomes following prompt immunotherapy are usually good, but delayed treatment often results in a protracted course with significant residual disability or death. Anti-NMDArE frequently mimics psychiatric disorders, so most patients are referred initially to a psychiatrist and treated for days or weeks before being correctly diagnosed.
METHODS
A systematic search of PubMed and EMBASE electronic databases identified all published reports of antibody-confirmed anti-NMDArE associated with psychiatric symptoms in patients <19 years old. Redundant reports were eliminated manually. For each patient, the order in which each feature was first observed was ranked relative to others. Median temporal ranks were used to compare the sequencing of individual features and major symptom domains.
RESULTS
One hundred and sixty seven cases (121 females) met the inclusion criteria. The most common features were dyskinesias (77.8%), seizures (72.5%), mutism or staring (40.7%), insomnia (39.5%), language dysfunction (36.5%), fever (31.1%), disorientation/confusion (28.7%), reduced arousal (28.1%), and memory disturbance (26.9%). The configuration and temporal sequencing of features were highly variable between individuals.
CONCLUSION
Clinicians need to suspect this disorder: if new behavioral symptoms arise in the context of a recent viral prodrome; if they are accompanied by dyskinesias, seizures or insomnia; or if psychiatric symptoms are unusual (e.g., non-verbal auditory hallucinations).
Topics: Adolescent; Anti-N-Methyl-D-Aspartate Receptor Encephalitis; Child; Female; Humans; Male
PubMed: 30653785
DOI: 10.1111/pcn.12821