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1.
Somatosens Mot Res ; : 1-8, 2023 Nov 16.
Artigo em Inglês | MEDLINE | ID: mdl-37969073

RESUMO

BACKGROUND: This study aimed to expand our existing information on changes in the regulation of motor movement and behaviour by investigating the effects of unilateral and bilateral lesions on the claustrum (CL). MATERIAL AND METHODS: 36 Wistar Albino adult male rats were randomly divided into six groups. An electrical lesion was created with a constant current source in the unilateral and bilateral anterior clastrum using a stereotaxic frame in rats. The lesioned groups and the control group underwent an automatic behaviour recording device such as mobilisation, freezing, eating, drinking behaviour, grooming, turning, etc. behaviour was recorded and analysed. Simultaneously, ultrasonic sounds in rats were examined with ultrasonic sound recording program. Anxiety was then reassessed with the elevated plus maze test. Data were compared with the control group. Rats were eventually sacrificed and the brain tissue was post-fixed. Histochemical examination was done and lesions' existence was confirmed. RESULTS: In this study, lesions of ventral of CL can cause increase in spontaneous behaviours such as freezing and rearing. And, it has been shown to cause a statistically significant change. In addition to the behavioural changes, right CL lesions have caused a significant increase in drinking behaviour associated with increased anxiety. All operated groups showed a significant decrease in clockwise and counterclockwise rotation movements. CONCLUSION: Experimental results show that CL lesions influence spontaneous behaviour which indicate the need for new studies to understand the role of CL in anxiety-depression.

2.
Psychogeriatrics ; 23(6): 1051-1060, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37752061

RESUMO

BACKGROUND: Glioblastoma, the most aggressive primary brain tumour in adults, poses significant challenges for patients and their caregivers. This study investigates a range of clinical parameters, such as symptoms, tumour characteristics, presence of seizures, mental status, and depression/anxiety, in glioblastoma patients. The rapid deterioration of physical and cognitive functions experienced by patients can have profound effects on both patients and their relatives throughout the course of the disease. The objective of this study was to examine and compare psychological symptoms between glioblastoma patients and their relatives. MATERIALS AND METHODS: The study included 98 adult patients with glioblastoma who underwent pre- and postoperative cognitive assessments using the Mini-Mental State Examination (MMSE). The Hospital Anxiety and Depression Scale (HADS) was also used to evaluate and compare psychological symptoms of patients and their relatives over time. Seizures were seen in 45.9% of patients, and the mean age of the patients was 60.1 ± 13.8 years. The patients were evaluated at various time intervals before and after surgery, and the data were retrospectively analyzed. RESULTS: The study found that before surgery, the anxiety levels of caregivers were significantly higher than those of patients during all evaluation periods. Additionally, the depression scores of caregivers were significantly higher than those of patients only in the first month following the operation. There were no significant differences in depression scores between patients and caregivers in the other assessment intervals. The average cognitive level of patients, as assessed by the MMSE scale was 22.4 before the operation and 20.9 after the operation. CONCLUSION: Glioblastoma has a significant impact on the mental health and emotional well-being of both patients and their relatives. This study highlights the importance of providing early support to both patients and their relatives before surgery. The study's strength is that it focuses on an early time point, prior to surgery, where both patients and their relatives are already affected and may require additional support. The results of this study can help healthcare professionals to better understand the psychological impact of glioblastoma and provide more targeted support to patients and their caregivers.


Assuntos
Glioblastoma , Bem-Estar Psicológico , Humanos , Idoso , Estudos Retrospectivos , Glioblastoma/patologia , Cuidadores/psicologia , Ansiedade/epidemiologia , Ansiedade/psicologia , Depressão/epidemiologia , Depressão/psicologia , Convulsões , Cognição , Qualidade de Vida/psicologia
3.
Fetal Pediatr Pathol ; 41(5): 731-740, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34338603

RESUMO

INTRODUCTION: We investigated the effect of epilepsy on cord blood oxidative stress status. MATERIAL AND METHODS: Thirty (n = 30) pregnant women with epilepsy and thirty (n = 30) healthy controls enrolled in this case control study. Albumin and IMA values and dynamic thiol/disulfide parameters were measured. RESULTS: Decreased native thiol and total thiol levels were found in the epilepsy group when compared to the control group (p: 0.001, p: 0.002). Higher IMA (p: 0.036) and lower albumin cord levels (P < 0.001) were measured in the epilepsy group with respect to the control group. Apgar scores at 1 and 5 miutes were lower in the epilepsy group (respectively; p = 0.012, p = 0.010). A negative correlation was found between IMA and cord pH value (r = 0.288 p = 0.034). CONCLUSION: This study showed that epilepsy may alter thiol disulfide homeostasis and IMA levels.


Assuntos
Epilepsia , Sangue Fetal , Biomarcadores , Estudos de Casos e Controles , Dissulfetos , Feminino , Sangue Fetal/metabolismo , Humanos , Estresse Oxidativo , Gravidez , Albumina Sérica Humana/metabolismo , Compostos de Sulfidrila
4.
Pediatr Neurosurg ; 52(3): 181-184, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28538230

RESUMO

Kernohan-Woltman notch phenomenon (KWNP) is an ipsilateral motor weakness due to compression of the contralateral cerebral peduncle. Most of the KWNP cases reported have been due to subdural hematomas, intracranial space-occupying lesions, and spontaneous bleeding of vascular malformations. In this study, we present the first pediatric case of KWNP caused by a traumatic epidural hematoma. Although subdural hematomas are the most frequent reason for KWNP, epidural hematomas may cause paradoxical ipsilateral signs not only in adults but also in pediatric patients.


Assuntos
Lesões Encefálicas/complicações , Hematoma Epidural Craniano/complicações , Hematoma Epidural Craniano/diagnóstico por imagem , Anisocoria/etiologia , Criança , Humanos , Masculino , Tomografia Computadorizada por Raios X
5.
Childs Nerv Syst ; 31(5): 759-63, 2015 May.
Artigo em Inglês | MEDLINE | ID: mdl-25712741

RESUMO

PURPOSE: Tethered cord syndrome (TCS) is an important disease and can produce progressive neurological symptoms. Studies about the filum terminale (FT) have drawn attention to the importance of histopathological investigation of this structure. The most interesting of these subtypes is the FT that incorporates peripheral nerve fibers (PNF). Our study aimed to analyze the frequency of PNF in the FT of 40 cases diagnosed with TCS. METHODS: We performed a retrospective histopathological investigation of FT excised during surgery of patients with TCS who underwent de-tethering. Neurologic and other types of postoperative complications were also revised. RESULTS: Analysis of the samples showed six dominant histopathological subtypes in the FT: fibroadipose tissues including peripheral nerve bundles (n = 14, 37 %), fibroadipose tissue (n = 10, 25 %), fibrous or adipose tissue (n = 7, 17 %), glial tissues including peripheral nerve sections (n = 4, 10 %), and ependymal and glial tissues (n = 4, 10 %). None of the patients presented with neurologic postoperative complications. CONCLUSION: Embryologic studies revealed that it is common to encounter different histological subtypes of FT pathology. However, the presence of peripheral nerve cells in the FT is important for neurosurgical practice due to the risk of sectioning a functional structure during surgery. In our analysis, we demonstrated the high frequency of PNF in FT pathology. However, since none of the patients showed any symptoms of neurologic deterioration, we considered that these fibers were probably not functional. Our findings emphasize the importance of neuromonitoring in TCS surgery. Although we consider that most of the fibers are probably not functional, neuromonitoring after surgery may prevent serious complications.


Assuntos
Tecido Adiposo/patologia , Cauda Equina/patologia , Defeitos do Tubo Neural/patologia , Nervos Periféricos/patologia , Adolescente , Cauda Equina/cirurgia , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Masculino , Defeitos do Tubo Neural/cirurgia , Procedimentos Neurocirúrgicos , Estudos Retrospectivos , Resultado do Tratamento
6.
Br J Neurosurg ; 29(1): 54-58, 2015 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-25222337

RESUMO

OBJECT: The purpose of this retrospective study is to demonstrate the effectiveness of Gamma Knife radiosurgery for essential trigeminal neuralgia (TGN) and assess the long-term outcome in a cohort from Turkey. METHODS: From 2004 to 2011, 93 cases of essential TGN were treated with single radiosurgery (RS). Female:male ratio was 45:48 and the mean age of the population was 57.06 years. Mean suffering time before treatment was 88.26 months. V2 + V3 was the most effected branch. 38.7% of the cases had no previous invasive procedures. Each case received doses ranging from 70 to 90 Gy in a target located at the pontine trigeminal root entry zone of the trigeminal nerve. Statistical analyses were performed to evaluate the outcome and factors leading to outcome status. RESULTS: The median follow-up period was 28 months. Of the cases 31.2% had poor outcome related to treatment failure after single RS session. The excellent and good outcomes were achieved in 29% and 39.8% of patients, respectively. The probability of maintaining pain relief was calculated as 67% at 36 months and 58% at 72 months. The only complication encountered was facial dysesthesia and was positive in 68.8% of patients. The presence of facial dysesthesia was significantly correlated with better outcomes. In this study, no other factor was determined to have significant influence on outcome. CONCLUSION: RS treatment for TGN is safe and effective. A multicenter, prospective, randomized controlled trial is needed to determine a guideline for better treatment protocols.

7.
Childs Nerv Syst ; 30(9): 1485-92, 2014 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-24972531

RESUMO

OBJECTIVE: The authors present the results of Gamma Knife stereotactic radiosurgery performed in a series of children with arteriovenous malformations (AVMs). METHODS: Between June 2005 and January 2014, 75 patients 18 years old or younger received Gamma Knife radiosurgery for AVMs. Of these, 58 patients were eligible for further analysis. The median age of the population was 12 years; 41% presented with hemorrhage, 34% with neurological insult, and 24% patients were diagnosed incidentally. The median AVM volume was 3.5 cm(3). The median radiosurgery-based AVM score (RSBAVMS) was 0.86. The median follow-up period was 32 months. RESULTS: Single session Gamma Knife radiosurgery resulted in complete AVM obliteration in 40 (68.9%) patients. There were 35 (60.3%) excellent outcome (complete obliteration with no new deficits) in this series. During the follow-up period, nine (15.51%) patients experienced new deficits and three (5.1%) patients experienced intracranial hemorrhage. The annual rate of developing new deficits and hemorrhage was calculated as 5.45 and 1.8%, respectively. Volume, gender, RSBAVMS, and nidus type factor were factors associated with excellent outcome. CONCLUSIONS: Radiosurgery was successful in majority of patients with minimal morbidity. Gamma Knife radiosurgery for AVMs can be a safe and successful method in pediatric patients.


Assuntos
Malformações Arteriovenosas/cirurgia , Radiocirurgia/métodos , Adolescente , Criança , Pré-Escolar , Feminino , Seguimentos , Humanos , Estimativa de Kaplan-Meier , Masculino , Pediatria , Estudos Retrospectivos , Índice de Gravidade de Doença , Resultado do Tratamento
8.
Asian J Neurosurg ; 18(1): 180-183, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-37056895

RESUMO

Cerebral vein thrombosis is a unique and rare type of cerebrovascular disease. The main challenge in identifying cerebral vein thrombosis is the presence of vague signs and symptoms that can resemble a variety of other intracranial pathologies. Our goal is to present the unique case of a young patient whose MRI scan revealed an abnormally enhancing tumor-like brain lesion that was heterogeneous in intensity and whose intraoperative view and histopathological findings were consistent with the vein of Labbe thrombosis, with ipsilateral transverse and sigmoid sinus involvement.

9.
Turk Neurosurg ; 33(1): 134-139, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36128919

RESUMO

AIM: To investigate the predictive role of thiol/ disulfide homeostasis and Ischemia-modified albumin (IMA) levels for NTDs. MATERIAL AND METHODS: A total of 71 pregnant women (31 with NTD and 42 healthy controls) were enrolled in this study. This prospective case-control study included pregnant women with NTDs as the study group and randomly selected age-matched pregnant women with healthy fetuses as the control group. The two groups were compared on the basis of thiol/disulfide and IMA levels in the maternal and fetal samples. RESULTS: No statistically significant difference in native thiol, total thiol, disulfide, and calculated ratios was observed between the groups. However, maternal IMA values were significantly higher in the study group. The IMA was proven to be a predictor with a sensitivity of 77.4% and specificity of 100% for NTDs at a cut-off value of 1.32. CONCLUSION: The examination of the maternal levels of IMA may be useful in the detection of NTDs.


Assuntos
Sangue Fetal , Defeitos do Tubo Neural , Humanos , Feminino , Gravidez , Biomarcadores , Albumina Sérica , Compostos de Sulfidrila , Dissulfetos , Estudos de Casos e Controles , Defeitos do Tubo Neural/diagnóstico , Estresse Oxidativo
10.
Pediatr Neurosurg ; 48(5): 291-8, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-23881087

RESUMO

AIM: To present clinical, radiological, and follow-up features of 34 cases with spinal split cord malformation (SCM) treated in a tertiary referral center between April 2000 and March 2012. METHODS: A total of 59 patients were treated due to SCM between April 2000 and March 2012 at the Gazi University Faculty of Medicine, Division of Pediatric Neurosurgery. Data for each patient were evaluated retrospectively, and age, sex, clinical findings, radiological findings, complications, and surgical results were recorded. Patients with a follow-up period of less than 6 months, patients harboring an open spinal dysraphism, and patients who had had their index surgery in another clinic were excluded, thus leaving a total of 34 patients for further analysis. RESULTS: There were 19 females and 15 males ranging in age from 2 months to 15 years (mean 5.04 years). In this cohort, skin stigma was the most common reason (76.5%) to seek medical care. Of the cases, 22 (64.7%) had lumbar SCM and 12 (35.3%) had thoracic SCM. There were no cervical SCM. Twenty-one (61.8%) of the cases had type 1 SCM and 13 (38.2%) had Type 2 SCM. Of the patients, 21 (61.8%) had a detectable neurological deficit at initial evaluation. There were no differences between patients with and without a neurological deficit regarding age, sex, type, and level of SCM. Overall evaluation of patients regarding their final neurological status revealed that 16 (47.1%) patients improved, 4 (11.8%) deteriorated, and 14 (41.2%) remained stable. CONCLUSIONS: In our opinion, all patients diagnosed with either type of SCM should be surgically treated to prevent further neurological deterioration. The results of this study, together with previously published data, confirm the effectiveness and safety of surgical intervention in SCM.


Assuntos
Disrafismo Espinal/diagnóstico por imagem , Disrafismo Espinal/cirurgia , Centros de Atenção Terciária/tendências , Adolescente , Criança , Pré-Escolar , Estudos de Coortes , Feminino , Seguimentos , Humanos , Masculino , Oriente Médio/epidemiologia , Radiografia , Estudos Retrospectivos , Disrafismo Espinal/epidemiologia
11.
Chem Biol Interact ; 359: 109914, 2022 May 25.
Artigo em Inglês | MEDLINE | ID: mdl-35395232

RESUMO

Cisplatin (CiSP) induced-overload Ca2+ entry results in the increase of mitochondrial oxidative stress and apoptosis in the cancer cell. TRPM2 cation channel is gated by the cytosolic ADP-ribose (ADPR) and reactive oxygen species (ROS). The high content of polyunsaturated fatty acid (PUFA) in the brain is a main target of ROS. Eicosapentaenoic acid (EPA) induces oxidant action via the enhance of PUFA content in the glioblastoma (DBTRG) cells. We hypothesized that a combination of CiSP and EPA may offer a potential therapy in the DBTRG cell by exerting the antitumor, oxidant, and apoptotic actions and stimulating Ca2+ influx and TRPM2 activity. In the DBTRG cells, we induced four groups as control, EPA (30 µM for 24 h), CiSP (25 µM for 24 h), and CiSP + EPA. The CiSP-induced intracellular Ca2+ responses to the TRPM2 activation were increased in the DBTRG cells from coming H2O2 and ADPR. The responses were decreased in the cells by the inhibitions of TRPM2 (ACA and 2/APB) and PARP/1 (DPQ and PJ34). The incubation of EPA further increased the intracellular Ca2+ responses, mitochondria function, and the generation of ROS in the DBTRGs. After the treatment of EPA, lipid peroxidation, apoptosis, cell death, caspase -3, -8, and -9 levels were further increased in the DBTRG, although the levels of glutathione, glutathione peroxidase, cell numbers, and cell viability were further decreased in the cells. In summary, anticancer, apoptotic, and oxidant actions of CiSP were further increased via the activation of TRPM2 channel in the DBTRGs by the treatment of EPA. Hence, TRPM2 stimulation via EPA could be used as an effective agent in the treatment of glioblastoma tumors with CiSP.


Assuntos
Neoplasias Encefálicas , Glioblastoma , Canais de Cátion TRPM , Encéfalo , Neoplasias Encefálicas/tratamento farmacológico , Cálcio/metabolismo , Contagem de Células , Cisplatino/farmacologia , Ácido Eicosapentaenoico/farmacologia , Glioblastoma/tratamento farmacológico , Glioblastoma/metabolismo , Humanos , Peróxido de Hidrogênio/metabolismo , Peróxido de Hidrogênio/farmacologia , Oxidantes/farmacologia , Estresse Oxidativo , Espécies Reativas de Oxigênio/metabolismo , Canais de Cátion TRPM/metabolismo
12.
Mol Neurobiol ; 59(6): 3703-3720, 2022 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-35366734

RESUMO

The hypoxia (HPX) acts the brain injury and apoptosis via the Ca2+ influx-induced excessive mitochondria free reactive oxygen species (mitROS) in neurons. The effective treatment of HPX is not possible yet. In addition to the antiviral and antiparkinsonian actions, amantadine (AMN) has been evaluated as a drug in treatments against brain injury. TRPM2 and TRPV4 channels are activated by mitROS. AMN attenuates NMDA receptor-induced Ca2+ influx, mitROS, inflammation, and apoptosis in the brain. However, the molecular pathways underlying AMN's neuroprotection against HPX remain elusive. We investigated the protective role of AMN via attenuation of TRPM2 and TRPV4 on oxidative neurotoxicity, mitochondrial membrane potential (ΔΨm), inflammation, and apoptosis in neuronal cells (SH-SY5Y). The SH-SY5Y and HEK293 cells were divided into six groups as follows: control, AMN (750 µM for 48 h), HPX (200 µM CoCl2 for 24 h), HPX + AMN, HPX + TRPM2 blockers (25 µM ACA or 100 µM 2APB for 30 min), and HPX + TRPV4 blocker (ruthenium red (RuR)-1 µM for 30 min). The HPX caused to upregulation of Ca2+ influx with an upregulation of ΔΨm and mitROS. The changes were not observed in the absence of TRPM2 and TRPV4 in the HEK293 cells. When HPX induction, TRPV4 agonist (GSK1016790A) and TRPM2 agonists (ADP-ribose and H2O2)-induced channel activity were diminished by the incubation of AMN and channel antagonists (RuR, ACA, and 2APB). The changes of mitROS, apoptotic markers (caspase-3 and -9), cell death rate, cell viability, cytokine (IL-1ß, IL-6, and TNF-α), ΔΨm, and Zn2+ concentrations were also restored by the incubation of AMN. In conclusion, the treatment of AMN attenuated HPX-mediated mitROS, apoptosis, and TRPM2/TRPV4-mediated overload Ca2+ influx and may provide an avenue for protecting the HPX-mediated neurodegenerative and cerebrovascular diseases associated with the upregulation of mitROS, Ca2+, and Zn2+ concentration.


Assuntos
Lesões Encefálicas , Síndromes Neurotóxicas , Canais de Cátion TRPM , Amantadina/farmacologia , Apoptose , Cálcio/metabolismo , Células HEK293 , Humanos , Peróxido de Hidrogênio/metabolismo , Hipóxia , Inflamação , Estresse Oxidativo , Espécies Reativas de Oxigênio/metabolismo , Canais de Cátion TRPM/metabolismo , Canais de Cátion TRPV/metabolismo
13.
Asian J Neurosurg ; 17(2): 317-323, 2022 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-36120609

RESUMO

In this technical report, we discuss the design and production of polymethyl methacrylate (PMMA) implants, which we successfully applied in two patients using silicone molds, and a retrospective review of these patients at 1- and 6-month intervals. By using open-source computer-assisted design software, three-dimensional printers, and the patient's thin-sliced computed tomography data, we designed and produced the implant template and used it to make silicone rubber mоlds for intraoperative PMMA casting with good results. As a negative of the implant, we created a silicon mold, which can be autoclaved. Two patients underwent PMMA cranioplasty using this method. Both implants were fitted into the defect without manipulation and good aesthetic аppеаrance of all patients was achieved. At follow-up 1 and 6 months after the operation, no complication was noted and the patients tolerated the cranioplasty platе wеll.

14.
World Neurosurg ; 163: e377-e383, 2022 07.
Artigo em Inglês | MEDLINE | ID: mdl-35390495

RESUMO

OBJECTIVE: C1/2 cervical pedicle screw fixation is a well-known procedure for treating severely damaged and unstable C1/2 fractures. On the other hand, C1/C2 screw fixation is not safe and can lead to potentially disastrous consequences. The importance of personalized 3-dimensional (3D) printed navigational guides in avoiding these consequences cannot be overstated. METHODS: We retrospectively reviewed the neuroimaging data of 16 patients who had undergone fixation for treatment of C1/2 diseases. We created patient-specific C1/2 models and drill guide models using open-source 3D editing software and a desktop 3D printer. The drill guides were then placed over the respective vertebrae models and fixated with 3.5-mm screws. Following fixation, the parts were scanned with a thin-slice (01 mm) computed tomography scan, and the screw trajectories in the transverse and sagittal planes were measured at each level. RESULTS: Of the total of 62 screws, 58 were type I (93.54%), 4 were type II (6.45%), and no screws were type III. The results showed that there was no significant deviation in the screw trajectories and the accuracy of the drill guides was 93.54%. In our study, type I and type II screws were deemed acceptable, and the acceptable rates of C1/2 screw fixation were 100%. CONCLUSIONS: In this preclinical study, we demonstrated that it is possible to create patient-specific pedicle drill guides using open-source editing software and a commercially available desktop polylactic acid printer, resulting in high accuracy rates in pedicle screw placement in C1/2 patient models.


Assuntos
Articulação Atlantoaxial , Parafusos Pediculares , Fusão Vertebral , Articulação Atlantoaxial/cirurgia , Vértebras Cervicais/diagnóstico por imagem , Vértebras Cervicais/cirurgia , Estudos de Viabilidade , Humanos , Estudos Retrospectivos , Software , Fusão Vertebral/métodos
15.
World Neurosurg ; 168: e336-e343, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-36334708

RESUMO

OBJECTIVE: To contrast the accuracy of C2 navigation template-assisted versus freehand pedicle and/or pars screw fixation in high-risk cases where a high-riding vertebral artery (VA) or narrow pedicle and complex deformities were associated. METHODS: In our hospital, computed tomography (CT) data of 30 patients with pathology on C0-1-2, who had risk factors for VA injury, that were complex cervical deformities, atlantoaxial instabilities with narrow C2 pedicle and/or HRVA variations were retrospectively reviewed. Using computer-aided design software and desktop printer we printed 3 sets of high cervical models per case. We divided them into 3 groups using 3 different C2 screw fixation techniques: the freehand pars screw fixation group, the freehand pedicle screw fixation group, and the navigation template-assisted pedicle screw fixation group. After 180 screw placements were finished, the parts underwent a CT scan. Then the breach rates on postoperative scans were measured. RESULTS: Our results showed that the accurate placement rate is not noticeably different between navigation template-assisted and freehand pedicle screws, where the high-riding vertebral artery and narrow pedicles were associated, but was better in the navigational template group with complex deformities. Pars screws were found to be superior in terms of accuracy. CONCLUSIONS: The current study suggests that navigational template-assisted pedicle screws are risky for high-risk individuals with abnormal anatomy, such as those with a high-riding vertebral artery, a narrow pedicle, and complex abnormalities, and alternative C2 pars screws may be a reliable option for such individuals.


Assuntos
Articulação Atlantoaxial , Anormalidades Musculoesqueléticas , Parafusos Pediculares , Fusão Vertebral , Humanos , Artéria Vertebral/diagnóstico por imagem , Artéria Vertebral/cirurgia , Artéria Vertebral/lesões , Vértebras Cervicais/diagnóstico por imagem , Vértebras Cervicais/cirurgia , Estudos Retrospectivos , Parafusos Pediculares/efeitos adversos , Fusão Vertebral/métodos , Articulação Atlantoaxial/diagnóstico por imagem , Articulação Atlantoaxial/cirurgia
16.
Asian J Neurosurg ; 14(1): 280-282, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30937054

RESUMO

Osteomas and exostoses of cerebellopontine angle (CPA) are very rare, benign, and usually slow-growing lesions; few case reports have been published about these lesions in literature. The most common localizations of these temporal bone lesions are the mastoid cortex and the external acoustic canal. To our knowledge, only two cases of bilateral osteoma arising from both internal acoustic canals (IACs) have been reported. However, these tumors are usually asymptomatic and diagnose incidentally, and they can cause symptoms related to the 7th and 8th cranial nerve involvement. We report on a 75-year-old woman affected with bilateral osteoma of CPA and review the literature that 27 cases of IAC osteoma and exostoses have been reported.

17.
Turk Neurosurg ; 29(2): 247-253, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30649798

RESUMO

AIM: To determine the neuroprotective functions of quercetin and compare them with methylprednisolone in an experimental spinal cord injury model in rats. MATERIAL AND METHODS: Thirty male, Wistar rats were assigned to five experimental groups: sham (n=6), trauma (n=6), methylprednisolone (n=6), single dose quercetin (n=6), and multiple doses of quercetin (n=6). An aneurysm clip compression method was used to produce spinal cord injury at level T7-9 after performing a laminectomy. In the sham group, only a laminectomy was performed. Clip compression was performed to the spinal cord after laminectomy in the trauma group. For Group 3, a single dose of intraperitoneal (ip) methylprednisolone (30mg/kg) was administered after laminectomy and trauma. A single dose of ip quercet in (100mg/kg) was administered after laminectomy and trauma in Group 4. For Group 5, multiple doses of ip quercetin (100 mg/kg) were administered on the first, second, and third days after laminectomy and trauma. Spinal cord and serum samples were obtained to measure the levels of malondialdehyde (MDA), nitric oxide (NO), total antioxidant levels (TAL) at the 72nd hour. Neurofunctional examinations of all the rats according to Drummond and Moore criteria and inclined-plane tests to evaluate functional healing were performed. All rats were sacrificed via intracardiac blood depletion after the procedure. RESULTS: Quercetin and methylprednisolone both increased plasma and tissue levels of NO and MDA, and decreased TAL, with a statistically significant difference (p < 0.05). NO and MDA levels in plasma and tissue were significantly higher in the trauma group (Group 2) when compared to the sham group (Group 1), and TAL levels were significantly lower (p < 0.05). There was a statistically significant increase in the treatment group's inclined-plane test (p < 0.05), while there was no difference in motor examination evaluations. CONCLUSION: The results of this experimental study suggest that quercetin can be thought as an option of treatment in spinal cord injury.


Assuntos
Metilprednisolona/farmacologia , Fármacos Neuroprotetores/farmacologia , Quercetina/farmacologia , Traumatismos da Medula Espinal/patologia , Medula Espinal/efeitos dos fármacos , Animais , Modelos Animais de Doenças , Masculino , Malondialdeído/sangue , Óxido Nítrico/sangue , Ratos , Ratos Wistar
19.
World Neurosurg ; 116: e791-e800, 2018 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-29803068

RESUMO

BACKGROUND: Stereotactic radiosurgery (SRS) is widely used to treat brain pathologies alone or in concert with other treatment modalities. However, there are some side effects, such as radiation injury characterized by edema and necrosis in peripheral tissues, that must be managed. A new treatment agent against this side effect is bevacizumab, which targets increased vascular endothelial growth factor (VEGF) as a prominent etiologic factor in radiation injury. In this study, we created a rat experimental model to describe the effects of both radiation and the anti-VEGF monoclonal antibody bevacizumab following high-dose SRS, and to compare the effects of prophylactic and delayed-onset bevacizumab treatment. METHODS: Fifty-four adult male Wistar rats were allocated into 9 groups based on differing Gamma-knife surgery (GKS) doses and bevacizumab treatment protocols. After 12 weeks, the rats' right frontal lobes were examined with hematoxylin and eosin staining and immunohistochemistry analysis via VEGF and CD31 antibodies. RESULTS: Radiation necrosis occurred to varying degrees in all irradiated animals between 3 and 10 weeks post-SRS. Higher GKS dose (50% isodose of 100 Gy) led earlier necrosis and prophylaxis of bevacizumab at this dose was associated with delayed onset of necrosis. Moreover, prophylactic bevacizumab mitigated the effects of radiation necrosis following GKS at both doses, whereas this effect was not prominent with late initiation of bevacizumab (treatment protocol). CONCLUSIONS: Our findings show that the onset and degree of radiation injury are affected by the GKS dose and protocol of bevacizumab administration.


Assuntos
Bevacizumab/administração & dosagem , Profilaxia Pré-Exposição/métodos , Lesões por Radiação/prevenção & controle , Radiocirurgia/efeitos adversos , Receptores de Fatores de Crescimento do Endotélio Vascular/antagonistas & inibidores , Animais , Masculino , Lesões por Radiação/metabolismo , Lesões por Radiação/patologia , Ratos , Ratos Wistar , Receptores de Fatores de Crescimento do Endotélio Vascular/metabolismo , Fator A de Crescimento do Endotélio Vascular/antagonistas & inibidores , Fator A de Crescimento do Endotélio Vascular/metabolismo
20.
J Korean Neurosurg Soc ; 57(2): 73-6, 2015 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-25733985

RESUMO

OBJECTIVE: Tumor necrosis factor alpha (TNF-α) have proven effects in pathogenesis of neuroinflammation after spinal cord injury (SCI). Current study is designed to evaluate the effects of an anti-TNF-α agent, adalimumab, on spinal cord clip compression injury in rats. METHODS: Thirty two male adult Wistar rats were divided into four groups (sham, trauma, infliximab, and adalimumab groups) and SCI was introduced using an aneurysm clip. Animals in treatment groups received 5 mg/kg subcutaneous adalimumab and infliximab right after the trauma. Malondialdehyde (MDA) levels were studied in traumatized spinal cord tissues 72 hours after the injury as a marker of lipid peroxidation. RESULTS: Animals that received anti-TNF-α agents are found to have significantly decreased MDA levels. MDA levels were significantly different between the trauma and infliximab groups (p<0.01) and trauma and adalimumab groups (p=0.022). There was no significant difference in neurological evaluation of the rats using Tarlov scale. CONCLUSION: These results suggest that, like infliximab, adalimumab has favorable effects on lipid peroxidation induced by spinal cord trauma in rats.

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