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Clinical Neuroscience

SEPTEMBER 30, 2020

TLR4 (Toll-like receptor-4) expression and frontal-cingulate volumes in schizophrenia

LI Hua, KÉRI Szabolcs

Evidence suggests that pathogen-associated pattern recognition receptors (Toll-like receptors, TLRs) are implicated in the pathophysiology of schizophrenia. TLRs are important in both peripheral immune responses and neuronal plasticity. However, the relationship between peripheral TLR expression and regional brain volumes is unknown in schizophrenia. We therefore assessed 30 drug-naïve, first-episode patients with schizophrenia. TLR4+/TLR1+ monocytes were measured using flow-cytometry. High resolution magnetic resonance images (T1 MRI) were obtained and analyzed with FreeSurfer. Results revealed significant negative correlations between the percentage of TLR4+ monocytes, mean fluorescent intensities, and brain volumes in frontal and anterior cingulate regions. The measures of TLR1+ monocytes did not show significant relationships with regional brain volumes. These results raise the possibility that abnormal TLR-activation is associated with decreased brain volumes in schizophrenia.

Lege Artis Medicinae

JULY 01, 2020

[Persisting Hashimoto’s thyroiditis converting to Graves’ disease]

TÓTH Géza

[Graves’disease and Hashimoto’s thyroiditis are the two most important types of autoimmune thyroid dis­eases. Autoimmune hyperthyroidism commonly leads later on to hypothyroidism. The conversion from persisting Hashimoto-thyroiditis to hyperthyroidism is rare in the literature. The author presents the cases of two patients, whose Hashimoto’s thyroiditis treated with thyroxin for years, changed into Graves’ hyperthyroidism sponta­neously. CASE REPORT – The patients had been diagnosed with autoimmune hypothyroidism since several years. The clinical symp­­toms, the low peripheral hormone le­vels, the high level of antithyroid antibo­dies and the ultrasound imaging confirmed the hypertrophic form of Hashimoto’s thy­roiditis. After several years of high dose le­vothyroxin treatment, clinical symptoms of hyperthyroidism have appeared. After omit­ting the substitution, the thyroid hormone levelled off at high values and the level of anti-TSH receptor antibodies raised too. The diffuse, obviously increased blood flow of the thyroid glands, and in one of the patients the thyroid scan, confirmed the Graves’ disease. During the thyreostatic treatment, the symptoms of the patients disappeared, they became euthyreoid and the antibody levels decreased as well. The Graves’ disease and the Hashimoto’s thyroiditis have many common features. These immunological, ge­netic and other common features enable the mutual transition of these two diseases.]

Clinical Neuroscience

JULY 30, 2020

[The complex intensive care and rehabilitation of a quadriplegic patient using a diaphragm pacemaker]

FODOR Gábor, GARTNER Béla, KECSKÉS Gabriella

[A 21 year female polytraumatized patient was admitted to our unit after a serious motorbike accident. We carried out CT imaging, which confirmed the fracture of the C-II vertebra and compression of spinal cord. Futhermore, the diagnostic investigations detected the compound and comminuted fracture of the left humerus and femur; the sacrum and the pubic bones were broken as well. After the stabilization of the cervical vertebra, a tracheotomy and the fixation of her limbs were performed. She spent 1.5 years in our unit. Meanwhile we tried to fix all the medical problems related to tetraplegia and respiratory insufficiency. As part of this process she underwent an electrophysiological examination in Uppsala (Sweden) and a diaphragm pacemaker was implanted. Our main goal was to reach the fully available quality of life. It is worth making this case familiar in a wider range of public as it could be an excellent example for the close collaboration of medical and non-medical fields.]

Clinical Neuroscience

MAY 30, 2020

Creutzfeldt-Jakob Disease: A single center experience and systemic analysis of cases in Turkey

USLU Ilgen Ferda, ELIF Gökçal, GÜRSOY Esra Azize, KOLUKISA Mehmet, YILDIZ Babacan Gulsen

We aimed to analyze the clinical, laboratory and neuroimaging findings in patients with sporadic Creutzfeldt-Jakob disease (CJD) in a single center as well as to review other published cases in Turkey. Between January 1st, 2014 and June 31st, 2017, all CJD cases were evaluated based on clinical findings, differential diagnosis, the previous misdiagnosis, electroencephalography (EEG), cerebrospinal fluid and cranial magnetic resonance imaging (MRI) findings in our center. All published cases in Turkey between 2005-2018 were also reviewed. In a total of 13 patients, progressive cognitive decline was the most common presenting symptom. Two patients had a diagnosis of Heidenhain variant, 1 patient had a diagnosis of Oppenheimer-Brownell variant. Seven patients (53.3%) had been misdiagnosed with depression, vascular dementia, normal pressure hydrocephalus or encephalitis. Eleven patients (87%) had typical MRI findings but only 5 of these were present at baseline. Asymmetrical high signal abnormalities on MRI were observed in 4 patients. Five patients (45.4%) had periodic spike wave complexes on EEG, all appeared during the follow-up. There were 74 published cases in Turkey bet­ween 2005 and 2018, with various clinical presentations. CJD has a variety of clinical features in our patient series as well as in cases reported in Turkey. Although progressive cognitive decline is the most common presenting symptom, unusual manifestations in early stages of the disease might cause misdiagnosis. Variant forms should be kept in mind in patients with isolated visual or cerebellar symptoms. MRI and EEG should be repeated during follow-up period if the clinical suspicion still exists.

Clinical Neuroscience

NOVEMBER 20, 2015

[Hyperglycaemic hemiballismus: implications from connectivity analysis for cognitive impairments]

KINCSES Tamás Zsigmond, VADÁSZ Dávid, NÉMETH Dezsõ, JANACSEK Karolina, SZABÓ Nikoletta, DÉZSI Lívia, BABOS Magor, VÖRÖS Erika, VÉCSEI László

[Hyperglycaemia induced movement disorders, such as hemiballism are rare disorders. The syndrome is characterised by the triad of hemiballism, contralateral T1-hyperintense striatal lesion and non-ketotic hyperglycaemia. Here we report a patient with untreated diabetes presenting with acute onset of hemiballism. MRI revealed T1 hyperintensity of the head of the caudate nucleus and the anterior putamen. The patient also had acantocytosis. Based on the detailed examination of the neuroradiological results and earlier findings we will imply on the pathomechanism. Based on previous findings microhemorrhages, extensive mineralisation, gemistocytic astrocytosis might play role in the development of the imaging signs. The connectivity pattern of the striatal lesion showed extensive connections to the frontal cortex. In coexistence with that the most severe impairment was found on the phonemic verbal fluency task measuring frontal executive functions. ]

Clinical Neuroscience

MARCH 30, 2016

Cerebral amyloid angiopathy related inflammation: is susceptibility weighted imaging the clue for diagnosis?

CSÉCSEI Péter, KOMOLY Sámuel, SZAPÁRY László, BARSI Péter

Background - Cerebral amyloid angiopathy-related inflammation (CAA-ri) is characterized by various neurological symptoms such as gradually developing confusion, progressive cognitive decline, seizure or headaches; T2 hyperintensities on magnetic resonance imaging (MRI); and neuropathological evidence of cerebral amyloid angiopathy (CAA) and associated vascular or perivascular inflammation. Although histological confirmation is necessary for accurate diagnosis, in case of typical clinical features and neuroimaging, the diagnosis can be established without biopsy. Case summary - We present the case of a 57-year-old man with a history of hypertension who presented to the emer¬gency department 3-week history of progressive headache and a gradually developing altered mental status. On examination, he was found to have left sided weakness and decreased pscyhomotility. Routine clinical work-up (lab investigations, CT, cerebrospinal fluid analysis) did not show obvious diagnosis, so we performed an MRI. It raised the suspicion of CAA-ri which diagnosis was verified by neuroradiological evaluation. High dose steroid treatment was initiated. The patient rapidly responded to treatment, his focal neurological signs resolved. Control MRI after 1.5 months showed multiple haemorrhagic laesions in the field of previous inflammation which posteriorly supported the previous supposed work-diagnosis. Conclusions - Although histopathology is the gold standard for the diagnosis of cerebral amyloid angiopathy, the typical clinical presentation, good response to steroids and accurate neuroradiological criteria make biopsy unnecessary to diagnose CAA-ri.

Clinical Neuroscience

MARCH 30, 2016

The electrophysiological changes after 1 hz RTMS in ALS patients. A pilot study

MAJOR Zsigmond Zoltán, VACARAS Vitalie, MARIS Emilia, CRISAN Ioana, FLOREA Bogdan, MAJOR Andrea Kinga, MURESANU Fior Dafin

Motor neuron diseases are disabling poor prognostic conditions, with no successful treatment. Repetitive transcranial magnetic stimulation might offer a temporary functional improvement. Objective - We intended to evaluate the extent of the functional improvement using electrophysiological and clinical tests. Methods - Patients with motor neuron disease (amyotrophic lateral sclerosis) were included. Muscle strength and respiratory function assessment represents the clinical approach, and central motor conduction time, motor unit number estimation, blink reflex and H-reflex stands for electrophysiology. Two tests were performed using the whole battery prior and after low frequency repetitive transcranial magnetic stimulation, using 1 Hz stimulation frequency for five consecutive days, 20 minutes daily, at 80% of the individual resting motor threshold. Results - Central motor conduction time, muscle strength and pulmonary function showed no statistically significant differences, but a tendency towards improvement. Motor unit number estimation, blink reflex and H-reflex showed a significantly better outcome after the five day repetitive transcranial magnetic stimulation treatment. Conclusion - Low frequency repetitive transcranial magnetic stimulation influences beneficially electrophysiological parameters in amyotrophic lateral sclerosis, but with little clinical impact; further studies are needed to validate the extent of the effect.

Clinical Neuroscience

JANUARY 30, 2016

Unanswered questions in the transcranial magnetic stimulation treatment of patients with depression

MORVAI Szabolcs, NAGY Attila, KOVÁCS Attila, MÓRÉ Csaba, BERECZ Roland, FRECSKA Ede

According to the WHO fact sheet depression is a common mental disorder affecting 350 million people of all ages worldwide. Transcranial Magnetic Stimulation (TMS) is a technique which allows the investigator to stimulate and study cortical functions in healthy subjects and patients suffering from various mental and neurological disorders. In the early 1990s, studies revealed that it is possible to evoke long term mood changes in healthy volunteers by rapid rate repetitive, TMS (rTMS) over the frontal cortex. Subsequent studies involving depressed patients found frontal cortical rTMS administered daily to be clinically effective. In the past two decades, numerous trials examined the therapeutic potential of rTMS application in the treatment of mood disorders with constantly evolving treatment protocols. The aim of this paper is to review the literature of the past two decades, focusing on trials addressing the efficacy and safety of rTMS in depressed patients. Our primary goal is to evaluate the results in order to direct future studies which may help investigators in the development of treatment protocols suitable in hospital settings. The time is not far when TMS devices will be used routinely by practitioners primarily for therapeutic purpose rather than clinical research. To our knowledge, a widely accepted “gold standard" that would offer the highest efficacy, with the best tolerability has not been established yet. In order to approach this goal, the most important factors to be addressed by further studies are: localization, frequency, intensity, concurrent medication, maintenance treatments, number of pulses, trains, unilateral, or bilateral mode of application.

Clinical Neuroscience

MARCH 30, 2016

[The therapeutic use of transcranial magnetic stimulation in major depression]

NÉMETH Viola Luca, CSIFCSÁK Gábor, KINCSES Zsigmond Tamás, JANKA Zoltán, MUST Anita

[The antidepressive effect of repetitive transcranial magnetic stimulation (rTMS) has been investigated for almost 20 years now. Several studies have been published aiming to identify the exact and reliable parameters leading to the desired therapeutic effect. However, the related literature shows great variability. The current overview aims to provide a comprehensive overview of factors associated with the therapeutic effect of rTMS in major depression. High frequency stimulation of the left dorsolateral prefrontal cortex (DLPFC) for 3-6 weeks leads to mood improvement comparable to the effect of antidepressive medications in 35-40% of patients. Pharmacotherapy resistant patients treated with rTMS reach remission for 3 months on average. Low frequency stimulation of the right DLPFC appears to be similarly effective, though much less investigated so far. In addition to the exact delineation of the stimulation area, treatment outcome is also related to stimulation intensity as well as the number of sessions and impulses. Considering the safety and tolerability aspects of rTMS, it might be a significant therapeutic support for therapy resistant patients. Above this, patients diagnosed with major depression might benefit from the additional positive influence of rTMS improving the effect of antidepressive medication. Based on converging research evidence, the Food and Drug Administration (FDA) agency approved the use of rTMS as a treatment option for therapy resistant major depression in 2008. So far, in Hungary rTMS is primarily considered as a promising tool in research settings only. Hopefully, patients suffering from major depression will increasingly benefit from the positive therapeutic effect of this intervention.]

Clinical Neuroscience

MARCH 30, 2016

[Computed tomographic examination of cranial lesions, a paleoradiological approach]

ZÁDORI Péter, BAJZIK Gábor, BÍRÓ Gergely, LELOVICS Zsuzsanna, BALASSA Tímea, BERNERT Zsolt, ÉVINGER Sándor, HAJDU Tamás, MARCSIK Antónia, MOLNÁR Erika, ŐSZ Brigitta, PÁLFI György, WOLFF Katalin, REPA Imre

[Background and purpose - Introducing the multidisciplinary paleoradiology research at the Institute of Diagnostic Imaging and Radiation Oncology of the Kaposvár University, highlighting the cases with potential central nervous system involvement - from the scanning methods to the 3D printing - in order to draw attention to the historical background and clinical aspects of certain pathological conditions. Methods - The authors developed the examination protocols for three different CT scanners. Among the examined archaeological remains cranial lesions were identified in 26 cases, from which 4 cases with potential central nervous system involvement are demonstrated. The scanning parameters and the advantages of secondary image reconstructions (multiplanar reconstruction, maximum intensity projection, three-dimensional volume rendering technique) are presented with the cases. Results - The authors demonstrate a case with destructive skull lesions due to syphilis from the 15th century AD, a condition rarely seen or even unknown nowadays in the modern world. With the CT images of the skull base fracture from the Iron Age, signs of healing could be verified. Using the CT images a non-invasive approach is presented in the case of the craniofacial osteosarcoma in order to visualize the local status and the direct intracranial propagation. Advantages of the 3D VRT reconstructions are shown in the case of unilateral coronal suture synostosis. Conclusion - Paleoradiological CT examinations serve as a non-invasive, non-destructive tool for studying archaeological remains and artifacts. The special applications provided by the imaging modality contribute to the conventional paleopathological investigations. Keywords: paleoradiology, computed tomography, 3D reconstruction, skull lesions, paleopathology]