Clinical Neuroscience

[European treatment recommendation of neuromyelitis optica spectrum disorders: critical remarks and case discussion]

KÕSZEGI Edit, ILLÉS Zsolt

MAY 30, 2012

Clinical Neuroscience - 2012;65(05-06)

[Neuromyelitis optica is a demyelinating disease of the central nervous system mediated by antibodies against the waterchannel aquaporin4 (AQP4). In a number of cases the clinical manifestation is spatially limited. Such events of separate longitudinally extensive transverse myelitis (LETM) or relapsing/bilateral optic neuritis (RION/BON) are defined as NMO spectrum diseases. The diagnosis is further challenged by anti-AQP4 seronegative cases. While chronic immunosuppressive therapy should be introduced in definitive NMO, treatment strategy of the NMO spectrum is less defined. Recent EFNS guidelines recommend chronic immunosuppressive treatment of NMO spectrum diseases depending on the clinical course even in AQP4-seropositive cases. Presenting a case with relapsing optic neuritis, here we emphasize the importance of early immunosuppressive therapy in all seropositive NMO spectrum diseases regardless of relapse severity, in order to prevent an upcoming devastating relapse, i.e. NMO conversion.]

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[Obstructive sleep apnea is a common disorder, characterized by repeated episodes of upper airway obstruction during sleep, resulting intermittent hypoxia and disruption of the normal sleep pattern, which caused cognitive dysfunction in these patients. Nasal continuous positive airway pressure is the treatment of choice for this disorder. The aim of the study is to evaluate the effect of short-term positive airway pressure on sleep pattern (polisomnographic measures), cognitive function and anxiety. Twenty four newly diagnosed and previously untreated patients with obstructive sleep apnea were evaluated a battery of neuropsychological tests before and after 2 and a half months of the treatment. We focused on working memory, short and long-term episodic memory, executive functions, anxiety and subjective sleepiness. Our results showed that the two and half month of treatment improved the respiration during sleep, sleep pattern and the subjective sleepiness. We found improvement in short- and long-term verbal memory, and complex working memory. Despite of treatment we did not find improvement in visuospatial learning. These results reveal that 2 and a half months of positive airway pressure treatment restored not only the normal respiration during sleep and normal sleep pattern, but also the cognitive functions. Our study suggests that cognitive dysfunction is at least partial reversible in obstructive sleep apnea patients after positive airway pressure treatment.]

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[Controlling pain has always been one of the biggest challenges of medical science. Despite pharmacological developments, still many patients suffer from long-lasting pain. During the last 40 years several surgical interventions have been used to modulate the activity of the central nervous system in order to control chronic, pharmacoresistant pain. Because such interventions may involve very serious adverse events, safer and at least equally efficient methods are still required. In the 90’s new techniques of non-invasive brain stimulation have been introduced that enable the facilitation or inhibition of distinct cortical areas. These methods are based on the electrical stimulation of brain structures and to date they have been successfully used to modulate perceptual, cognitive and motor functions in healthy subjects and various diseases as well. In this review we describe such techniques of non-invasive brain stimulation, namely repeated transcranial magnetic stimulation and transcranial direct current stimulation and review the current literature about their efficacy in controlling acute and chronic pain.]

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[The last decade has brought significant development in spine surgery. As in all field of surgery, introduction of the minimal invasive, atraumatic procedures characterized our activities. The number of short and long-time complications were significantly reduced and the effectiveness of operations were markedly improved by the new technical conditions, for example by the use of neuronavigation, surgical microscope, intraoperative fluoroscopy, high speed drill and the widespread of keyhole concept. The applied multislice CT imaging and the high resolution MRI enabled to improve the accuracy of the planned surgical procedures and to reduce the mortality and morbidity of operations. In our studies technical methods were investigated and new developments were established in the field of minimal invasive spine surgery. The National Institute of Neurosurgery's spinal surgical team pioneers further development and application of novel minimal invasive procedures. Applied methods of vanguard surgical procedures include split laminotomy, the “archbone” technique, the “over the top” decompression, the multilevel hemi-semi laminectomy, the supraforaminal “burr hole”, the facet joint sparing “open tunnel” techniques or parasplit minimal invasive approaches. The new innovative surgical techniques are applied in our daily routine and meet international trends by utilizing benefits of minimal invasive spinal surgery. Using our newly developed innovative techniques allow to decompress neural elements in case of spinal canal stenosis and to remove the intramedullary and extramedullary space-occupying lesions located in the spinal canal and spreading extraspinally through the neuroforamen. These techniques are specially tailored to preserve structural integrity and stability of the spinal column, and allow at the same time to minimize resection of and injury to tissues not directly involved in the pathologic processes. In our studies a classification system of spatial localization of pathological lesions and processes in spinal canal was developed by us. Using this classification system enables the surgeon to select and apply the appropriate minimal invasive technique from dorsal direction and to remove the space-occupying lesions located in the spinal canal. The minimal invasive techniques were characterized and summarized. This overview of the minimal invasive techniques can be applied and recommended in the daily routine of spine surgery. We proudly employ novel surgical techniques having been developed in our institution. These techniques are internationally recognized and applied in our practice on daily basis as well.]

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Life threatening rare lymphomas presenting as longitudinally extensive transverse myelitis: a diagnostic challenge

TOLVAJ Balázs, HAHN Katalin, NAGY Zsuzsanna, VADVÁRI Árpád, CSOMOR Judit, GELPI Ellen, ILLÉS Zsolt, GARZULY Ferenc

Background and aims – Description of two cases of rare intravascular large B-cell lymphoma and secondary T-cell lymphoma diagnosed postmortem, that manifested clinically as longitudinally extensive transverse myelitis (LETM). We discuss causes of diagnostic difficulties, deceptive radiological and histological investigations, and outline diagnostic procedures based on our and previously reported cases. Case reports – Our first case, a 48-year-old female was admitted to the neurological department due to paraparesis. MRI suggested LETM, but the treatments were ineffective. She died after four weeks because of pneumonia and untreatable polyserositis. Pathological examination revealed intravascular large B-cell lymphoma (IVL). Our second case, a 61-year-old man presented with headache and paraparesis. MRI showed small bitemporal lesions and lesions suggesting LETM. Diagnostic investigations were unsuccessful, including tests for possible lymphoma (CSF flow cytometry and muscle biopsy for suspected IVL). Chest CT showed focal inflammation in a small area of the lung, and adrenal adenoma. Brain biopsy sample from the affected temporal area suggested T-cell mediated lymphocytic (paraneoplastic or viral) meningoencephalitis and excluded diffuse large B-cell lymphoma. The symptoms worsened, and the patient died in the sixth week of disease. The pathological examination of the presumed adenoma in the adrenal gland, the pancreatic tail and the lung lesions revealed peripheral T-cell lymphoma, as did the brain and spinal cord lesions. Even at histological examination, the T-cell lymphoma had the misleading appearance of inflammatory condition as did the MRI. Conclusion – Lymphoma can manifest as LETM. In cases of etiologically unclear atypical LETM in patients older than 40 years, a random skin biopsy (with subcutaneous adipose tissue) from the thigh and from the abdomen is strongly recommended as soon as possible. This may detect IVL and provide the possibility of prompt chemotherapy. In case of suspicion of lymphoma, parallel examination of the CSF by flow cytometry is also recommended. If skin biopsy is negative but lymphoma suspicion remains high, biopsy from other sites (bone marrow, lymph nodes or adrenal gland lesion) or from a simultaneously existing cerebral lesion is suggested, to exclude or prove diffuse large B-cell lymphoma, IVL, or a rare T-cell lymphoma.

Clinical Neuroscience

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Clinical Neuroscience

[What happens to vertiginous population after emission from the Emergency Department?]

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[Background – Dizziness is one of the most frequent complaints when a patient is searching for medical care and resolution. This can be a problematic presentation in the emergency department, both from a diagnostic and a management standpoint. Purpose – The aim of our study is to clarify what happens to patients after leaving the emergency department. Methods – 879 patients were examined at the Semmel­weis University Emergency Department with vertigo and dizziness. We sent a questionnaire to these patients and we had 308 completed papers back (110 male, 198 female patients, mean age 61.8 ± 12.31 SD), which we further analyzed. Results – Based on the emergency department diagnosis we had the following results: central vestibular lesion (n = 71), dizziness or giddiness (n = 64) and BPPV (n = 51) were among the most frequent diagnosis. Clarification of the final post-examination diagnosis took several days (28.8%), and weeks (24.2%). It was also noticed that 24.02% of this population never received a proper diagnosis. Among the population only 80 patients (25.8%) got proper diagnosis of their complaints, which was supported by qualitative statistical analysis (Cohen Kappa test) result (κ = 0.560). Discussion – The correlation between our emergency department diagnosis and final diagnosis given to patients is low, a phenomenon that is also observable in other countries. Therefore, patient follow-up is an important issue, including the importance of neurotology and possibly neurological examination. Conclusion – Emergency diagnosis of vertigo is a great challenge, but despite of difficulties the targeted and quick case history and exact examination can evaluate the central or peripheral cause of the balance disorder. Therefore, to prevent declination of the quality of life the importance of further investigation is high.]