A case report of a 68-year-old otherwise-healthy female patient with Spetzler-Martin (SM) grade I arteriovenous malformation (AVM) in her left frontal region is presented. After an uneventful surgery, cerebral venous infarction developed, and the patient was rendered hemiparetic with motor aphasia. After bony decompression, slow improvement was seen, and 3 months after surgery, the patient was neurologically intact. Six months after AVM resection, cranioplasty was performed. Infarction was caused by the thrombosis of a long primary draining vein, which finished its course in the normal cortical venous system. The case supports the venous origin of postoperative bleeding after AVM resection instead of the normal perfusion pressure phenomenon.

• Klíčová slova
• Cerebral arteriovenous malformation, venous occlusive disease,
• MeSH
• cerebrální infarkt * etiologie   chirurgie   MeSH
• intrakraniální arteriovenózní malformace * chirurgie   komplikace   MeSH
• lidé MeSH
• magnetická rezonanční tomografie MeSH
• mozkové žíly chirurgie   diagnostické zobrazování   MeSH
• pooperační komplikace etiologie   chirurgie   MeSH
• senioři MeSH
• Check Tag
• lidé MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• kazuistiky MeSH

The histological grade is crucial for therapeutic management, and its reliable preoperative detection can significantly influence treatment approach. Lacking established risk factors, this study identifies preoperative predictors of high-grade skull base meningiomas and discusses the implications of non-invasive detection. A multicentric study was conducted on 552 patients with skull base meningiomas who underwent primary surgical resection between 2014 and 2019. Data were gathered from clinical, surgical and pathology records and radiological diagnostics. The predictive factors of higher WHO grade were analysed in univariate analysis and multivariate stepwise selection logistic regression analysis. Histological analysis revealed 511 grade 1 (92.6%) and 41 grade 2 (7.4%) meningiomas. A prognostic model predicting the probability of WHO grade 2 skull base meningioma (AUC 0.79; SE 0.04; 95% Wald Confidence Limits (0.71; 0.86)) based on meningioma diameter, presence of an arachnoid plane and cranial nerve palsy was built. Accurate preoperative detection of WHO grade in skull base meningiomas is essential for effective treatment planning. Our logistic regression model, based on diameter, cranial nerve palsy, and arachnoid plane, is tailored for detecting WHO grade 2 skull base meningiomas, even in outpatient settings.

• Klíčová slova
• Case series, Meningioma, Risk factors, Skull base, Surgery, Tumor grading,
• MeSH
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• meningeální nádory * patologie   chirurgie   diagnostické zobrazování   MeSH
• meningeom * patologie   chirurgie   diagnostické zobrazování   MeSH
• mladý dospělý MeSH
• nádory baze lební * patologie   chirurgie   diagnostické zobrazování   MeSH
• prognóza MeSH
• retrospektivní studie MeSH
• rizikové faktory MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• stupeň nádoru * MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mladý dospělý MeSH
• mužské pohlaví MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• multicentrická studie MeSH

INTRODUCTION: Pediatric low-grade gliomas arising from the thalamus or thalamopeduncular junction are rare. Prognostic factors are thus seldom reported in the literature. RESEARCH QUESTION: This systematic review aims to define the factors influencing the prognosis of pediatric patients with thalamic and thalamopeduncular low-grade gliomas. MATERIAL AND METHODS: An extensive literature search in adherence to Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines was performed and included Web of Science, Scopus, and OVID interface (Medline and Embase). Original articles were selected if they provided data on 10 or more patients under 18 years old with separate or retrievable data for thalamic or thalamopeduncular low-grade gliomas, as well as at least one prognostic factor and its corresponding outcome. The risk of bias and applicability were assessed using The Quality Assessment of Prognostic Accuracy Studies criteria. RESULTS: The study selection process resulted in the inclusion of 14 articles out of the initial pool of 876 references. These 14 articles encompassed data from 446 patients. The prognostic factors reported were the extent of resection in ten studies, age and radiotherapy in four studies, bilateral involvement and molecular genetics in two studies, and sex and dissemination in one study each. Significant prognostic factors included the extent of resection, bilateral involvement, histology, and radiotherapy. DISCUSSION AND CONCLUSION: The reported factors considered significant for prognosis align with previously published data. The maximal safe resection, as a potentially curative modality for thalamic low-grade glioma, and the multidisciplinary approach to each patient should be a standard of care. Given the excellent long-term outlook of these patients, the extent of resection should not be pursued at the risk of neurological function since additional therapeutic possibilities are available today, such as molecular-targeted agents.

• Klíčová slova
• Low-grade glioma, Outcome, Pediatric, Prognosis, Thalamic, Thalamopeduncular,
• Publikační typ
• časopisecké články MeSH
• přehledy MeSH

In recent years, numerous evidence has been accumulated about the extent of A-to-I editing in human RNAs and the key role ADAR1 plays in the cellular editing machinery. It has been shown that A-to-I editing occurrence and frequency are tissue-specific and essential for some tissue development, such as the liver. To study the effect of ADAR1 function in hepatocytes, we have created Huh7.5 ADAR1 KO cell lines. Upon IFN treatment, the Huh7.5 ADAR1 KO cells show rapid arrest of growth and translation, from which they do not recover. We analyzed translatome changes by using a method based on sequencing of separate polysome profile RNA fractions. We found significant changes in the transcriptome and translatome of the Huh7.5 ADAR1 KO cells. The most prominent changes include negatively affected transcription by RNA polymerase III and the deregulation of snoRNA and Y RNA levels. Furthermore, we observed that ADAR1 KO polysomes are enriched in mRNAs coding for proteins pivotal in a wide range of biological processes such as RNA localization and RNA processing, whereas the unbound fraction is enriched mainly in mRNAs coding for ribosomal proteins and translational factors. This indicates that ADAR1 plays a more relevant role in small RNA metabolism and ribosome biogenesis.

• Klíčová slova
• ADAR1, RNA editing, Y RNA, hepatocyte, miRNA, snoRNA,
• MeSH
• adenosindeaminasa * genetika   metabolismus   MeSH
• buněčné linie MeSH
• editace RNA * MeSH
• genový knockout MeSH
• hepatocyty * metabolismus   MeSH
• lidé MeSH
• messenger RNA genetika   metabolismus   MeSH
• polyribozomy metabolismus   genetika   MeSH
• proteiny vázající RNA * genetika   metabolismus   MeSH
• proteosyntéza MeSH
• transkriptom MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• ADAR protein, human MeSH Prohlížeč
• adenosindeaminasa * MeSH
• messenger RNA MeSH
• proteiny vázající RNA * MeSH

• MeSH
• kognice fyziologie   MeSH
• kognitivní dysfunkce psychologie   MeSH
• lidé středního věku MeSH
• lidé MeSH
• neuropsychologické testy MeSH
• normotenzní hydrocefalus * chirurgie   diagnóza   MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• Check Tag
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• dopisy MeSH
• srovnávací studie MeSH

Interfaces between AISI 304 stainless steel screws and cranial bone were investigated after long-term implantation lasting for 42 years. Samples containing the interface regions were analyzed using state-of-the-art analytical techniques including secondary ion mass, Fourier-transform infrared, Raman, and X-ray photoelectron spectroscopies. Local samples for scanning transmission electron microscopy were cut from the interface regions using the focused ion beam technique. A chemical composition across the interface was recorded in length scales covering micrometric and nanometric resolutions and relevant differences were found between peri-implant and the distant cranial bone, indicating generally younger bone tissue in the peri-implant area. Furthermore, the energy dispersive spectroscopy revealed an 80 nm thick steel surface layer enriched by oxygen suggesting that the AISI 304 material undergoes a corrosion attack. The attack is associated with transport of metallic ions, namely, ferrous and ferric iron, into the bone layer adjacent to the implant. The results comply with an anticipated interplay between released iron ions and osteoclast proliferation. The interplay gives rise to an autocatalytic process in which the iron ions stimulate the osteoclast activity while a formation of fresh bone resorption sites boosts the corrosion process through interactions between acidic osteoclast extracellular compartments and the implant surface. The autocatalytic process thus may account for an accelerated turnover of the peri-implant bone.

• Klíčová slova
• biocorrosion, implant, peri-implant bone, remodelling, stainless steel AISI 304,
• MeSH
• fotoelektronová spektroskopie MeSH
• koroze MeSH
• kostní šrouby * škodlivé účinky   MeSH
• lebka * patologie   MeSH
• lidé MeSH
• nerezavějící ocel * chemie   MeSH
• povrchové vlastnosti MeSH
• Ramanova spektroskopie MeSH
• rozhraní kost/implantát MeSH
• spektroskopie infračervená s Fourierovou transformací MeSH
• železo chemie   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• nerezavějící ocel * MeSH
• železo MeSH

Brain arteriovenous malformations (AVMs) are a rare entity of vascular anomalies, characteristic of anatomical shunting where arterial blood directly flows into the venous circulation. The main aim of the active treatment policy of brain AVMs is the prevention of haemorrhage. There are well-established treatment strategies that continually improve in their safety and efficacy, primarily due to the advances in imaging modalities, targeted and novel techniques, the development of alternative treatment approaches, and even better experience with the disease itself. There are interesting imaging novelties that may be prospectively applicable in the decision-making and planning of the most effective treatment approach for individual patients with intracranial AVM. Surgery is often considered the first-line treatment; however, each patient should be evaluated individually, and the risks of the active treatment policy should not overcome the benefits of the spontaneous natural history of the disease. All treatment modalities, i.e., surgery, radiosurgery, endovascular embolization, and observation, are justified but need to be meticulously selected for each individual patient in order to deliver the best treatment outcome. This chapter deals with historical and currently applied dogmas, followed by introductions of advances in each available treatment modality of AVM management.

• Klíčová slova
• Arteriovenous malformation, Endovascular methods, Natural history, Radiosurgery, Surgery,
• MeSH
• endovaskulární výkony metody   MeSH
• intrakraniální arteriovenózní malformace * terapie   MeSH
• lidé MeSH
• neurochirurgické výkony metody   MeSH
• radiochirurgie * metody   MeSH
• terapeutická embolizace * metody   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH

BACKGROUND: Ependymomas in the fourth ventricle in adults are rare entity. Surgical treatment of adult ependymomas is the only treatment modality since no other effective alternative is available. Radical resection often means cure but it is hindered by the nature and location of the lesion. METHODS: Technical aspects of the fourth ventricle ependymoma surgery in adults are discussed. Anatomy of the area is provided with the step-by-step surgical algorithm. CONCLUSION: Radical resection of low-grade ependymoma with a detailed understanding of the anatomy in this area is vital considering the high effectiveness of the treatment and its excellent prognosis.

• Klíčová slova
• Case series, Ependymoma, Microsurgery, Surgical resection, Technical note,
• MeSH
• čtvrtá mozková komora * chirurgie   diagnostické zobrazování   patologie   MeSH
• dospělí MeSH
• ependymom * chirurgie   patologie   diagnostické zobrazování   MeSH
• lidé MeSH
• nádory mozkové komory * chirurgie   patologie   diagnostické zobrazování   MeSH
• neurochirurgické výkony * metody   MeSH
• Check Tag
• dospělí MeSH
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• přehledy MeSH

We sought to describe the cognitive profile of patients with Idiopathic Normal Pressure Hydrocephalus (iNPH) using a comprehensive neuropsychological battery. Based on age and education correlated norms, we aimed to compare performance in each measured cognitive domain: executive functions (EFs), verbal memory (VM), non-verbal memory (nVM), visuoconstructional abilities (VA) and attention/psychomotor speed (A/PS). Patients diagnosed with iNPH underwent comprehensive neuropsychological evaluation before shunting. Their performance was compared to the age and education correlated norms. Correlation of different cognitive domains in iNPH profile was performed. A total of 53 iNPH patients (73.21 ± 5.48 years) were included in the study. All of the measured cognitive domains were significantly damaged. The most affected domains were EFs and VM (p<0.001 and p<0.001, respectively). A/PS domain was affected milder than EFs and VM (p<0.001). The least affected domains were nVM (p<0.001) and VA (p<0.001). Patients with iNPH are affected in all cognitive domains and the cognitive decline is uneven across these domains. The impairment of memory was shown to depend on the presented material. VM was shown to be much more severely affected than nVM and along with VM, EFs were shown to be the most affected. A/PS speed was shown to be less affected than VM and EFs and the least affected domains were nVM and VA.

• Klíčová slova
• Cognitive decline, executive functions, Neuropsychology, Normal pressure hydrocephalus,
• MeSH
• exekutivní funkce MeSH
• kognice MeSH
• kognitivní dysfunkce * MeSH
• lidé MeSH
• neuropsychologické testy MeSH
• normotenzní hydrocefalus * diagnóza   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH

In this study, we provide a comprehensive clinical and molecular biological characterization of radiation-induced gliomas (RIG), including a risk assessment for developing gliomas. A cohort of 12 patients who developed RIG 9.5 years (3-31 years) after previous cranial radiotherapy for brain tumors or T-cell acute lymphoblastic leukemia was established. The derived risk of RIG development based on our consecutive cohort of 371 irradiated patients was 1.6% at 10 years and 3.02% at 15 years. Patients with RIG glioma had a dismal prognosis with a median survival of 7.3 months. We described radiology features that might indicate the suspicion of RIG rather than the primary tumor recurrence. Typical molecular features identified by molecular biology examination included the absence of Histon3 mutation, methylation profile of pedHGG-RTK1 and the presence of recurrent PDGFRA amplification and CDKN2A/B deletion. Of the two long-term surviving patients, one had gliomatosis cerebri, and the other had pleomorphic xanthoastrocytoma with BRAF V600E mutation. In summary, our experience highlights the need for tissue diagnostics to allow detailed molecular biological characterization of the tumor, differentiation of the secondary tumor from the recurrence of the primary disease and potentially finding a therapeutic target.

• MeSH
• astrocytom * patologie   MeSH
• gliom * genetika   radioterapie   MeSH
• lidé MeSH
• mutace MeSH
• nádory mozku * genetika   radioterapie   MeSH
• protoonkogenní proteiny B-Raf genetika   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• protoonkogenní proteiny B-Raf MeSH