Clinical Neuroscience

[Myelination disturbance in a patient with hyperuricemia and hyperserotoninemia combined with 18q deletion syndrome]

LÁSZLÓ Aranka1, VÖRÖS Erika2, BUGA Klára3, HORVÁTH Katalin4, MAYER Péter5, OSZTOVICS Magda†6, PÁVICS László7, SVEKUS András8, PATTERSON C. Marc9

NOVEMBER 30, 2009

Clinical Neuroscience - 2009;62(11-12)

[We previously reported a male patient with an 18q21.3 deletion, hyperuricemia and typical symptoms of the Lesch- Nyhan syndrome who lacked hypoxanthine-guanine-phosphoribosyl- transferase (HGPRT) deficiency. The patient developed progressive peripheral neuropathy in additon to his profound mental retardation and self-injurious behavior. At the age of 23 years MR imaging revealed globally delayed myelination with relative sparing of the corpus callosum and frontal lobes. They were focal hyperintensities suggestive of gliosis. Multimodality evoked potentials found evidence of impaired central and peripheral conduction. Single photon emission computed tomographic (SPECT) imaging demonstrated left frontal hyperperfusion and under it a temporoparietal hypoperfusion.]


  1. Department of Pediatrics and Children's Health Center, Albert Szent-Györgyi Medical Centre, University of Szeged, Szeged
  2. Department of Radiology, Albert Szent-Györgyi Medical Centre, University of Szeged, Szeged
  3. Clinic of Nuclear Medicine, Imre Haynal Health Science University, Budapest
  4. Department of Radiology, Imre Haynal Health Science University, Budapest
  5. Department of Neurology Erzsébet Hospital, Hódmezôvásárhely
  6. Department of Genetics, Ágost-Schöpf-Merei Hospital, Budapest
  7. Department of Nuclear Medicine, Albert Szent-Györgyi Medical Centre, University of Szeged, Szeged
  8. Kálmán Pándy Hospital, Department of Paediatrics, Gyula
  9. Division of Pediatric Neurology, Departments of Neurology and Pediatrics, Columbia University, New York



Further articles in this publication

Clinical Neuroscience



Clinical Neuroscience

[New vistas and views in the concept of generalized epilepsies]


[The aim of this work is to show explicitly why the “idiopathic generalized epilepsy” concept becomes outfashioned and untenable. As the concept of “generalized epilepsies” is from long ago closely related to the thalamo-cortical system, we briefly summarize the functional anatomy, the double working mode of the thalamo-cortical system in different vigilance states and it’s role in development of the spike - wave pattern. The next part shows weaknesses of this concept from the EEG, seizure semiology, and neuroimaging point of view. Further experimental and clinical arguments are accumulated from the reflex epileptic features in IGE, indicating local/regional cortical hyperexcitability. A separate part is devoted to genetic aspects of the question. Lastly implications to epilepsy classification are shown and an outlook toward a unified epilepsy concept is provided. The epileptic disorder of the thalamo-cortical system is responsible for the development of “generalized", synchronous spike-wave paroxysms as the common neurophysiological background in “primary” - idiopathic and in “secondary” generalized epilepsies. This disorder is specifically related to the burstfiring working mode of the thalamo-cortical system during NREM sleep (is an epileptic exageration of it). The “generalized” epilepsy category should be abandoned, being misleading. Epilepsies are proposed to be classified according to their network properties and relations to different physiological systems of the brain. The different phenotypes, named earlier idiopathic (primary) generalized, or symptomatic (secondary) generalized (with encephalopathic features), should be delineated depending on the following factors: 1. speed and extent of syncronization within the thalamo-cortical system, 2. the way how the thalamo-cortical system is involved, 3. which kind of cortical triggers play role, 4. the degree and level of the disorder (restricted to the molecular level or extended to the level of structural alterations - in the cortex or more diffusely, 5. genetic targets and features.]

Clinical Neuroscience

[Role of zonisamid in treating epilepsy, Parkinson disorders and other neurological diseases]


[On the basis of six randomized controlled trials, zonisamide (ZNS) can be prescribed as add-on treatment in focal adulthood epilepsy in USA and Europe. In Japan, it can be prescribed as first-line monotherapy drug - independent of age. ZNS may also be effective in idiopathic generalized epilepsy and some difficult-to-treat epilepsies including West, Lennox-Gastaut, or Dravet syndromes. The most frequent side effects of ZNS are related to central nervous system occurring in 19%. Kidney stones and oligohidrosis are ZNS-specific side effects. Loss of appetite and weight are usually “beneficial” effects. ZNS is not recommended in pregnancy. ZNS can be taken once daily, which may be beneficial in non-compliance. The pathomechanism of ZNS is different from other antiepileptic drugs. ZNS has an effect on the voltage-gated Na+- and T-type Ca2+ channels as well as on the dopaminerg, glutamaterg, cholinerg, and GABAerg systems. The multiple way of action may be the reason why ZNS seems to be a broad-spectrum drug and beneficial in various neurological disorders. ZNS reduces production of free radicals according to in vitro and in vivo studies. Animal experiments suggest that ZNS may be a neuroprotective agent. Based on an adequate randomized controlled trial, ZNS is effective in adjuctive treatment of Parkinson disorder. A peculiar benefit of the ZNS is that parallel to its positive effect on motor impairment it also reduces severity of dyskinesias. ZNS may be effective in bipolar disorder, obesity, eating disorders, and migraine prophylaxis.]

Clinical Neuroscience

[Quantitative analysis of the genes determining spinal muscular atrophy]


[Spinal muscular atrophy (SMA) is one of the most common autosomal recessive diseases, affecting approximately one in 10.000 live births and with a carrier frequency of approximately one in 35. The disease is caused by a deficiency of the ubiquitous protein survival of motor neuron (SMN), which is encoded by the SMN1 and SMN2 genes. Due to a single nucleotide polymorphism in exon 7, SMN2 produces less full-length transcript than SMN1 and cannot prevent neuronal cell death at physiologic gene dosages. On the other hand, the copy number of SMN2 affects the amount of SMN protein produced and the severity of the SMA phenotype. SMN gene dosage analysis can determine the copy number of SMN1 to detect carriers and patients heterozygous for the absence of SMN1 exon 7. This study provides copy number estimation of SMN1 gene by real-time PCR technique in 56 SMA type I., II., III. patients, 159 parents and healthy relatives and in 152 undefined SMA patients. Among the family members, 91 carriers have been detected and in 56 patients homozygous deletion of SMN1 exon 7 has been confirmed. Moreover, in 12 patients compound heterozygosity of SMN1 exon 7 mutation has been detected, thus providing the possible diagnosis of SMA. In 94 patients, copy number of SMN2 has also been evaluated and a good correlation has been found with the phenotype of the disease. Due to the genetic complexity and the high carrier frequency, accurate risk assessment and genetic counselling are particularly important for the families. These new results provide improvement of the diagnostic service in SMA in Hungary with focus on proper genetic counselling and possible enrolment of the patients in future therapeutic interventions.]

Clinical Neuroscience

[Guillain–Barré syndrome in childhood]

KOLLÁR Katalin, MÓSER Judit, ROSDY Beáta, LIPTAI Zoltán

[Background - Guillain-Barré syndrome (GBS) is clinically well known since 1916. It can occur at any age. Its main characteristic is acute rapidly ascending flaccid paresis. It is a neuro-immunologic disorder with heterogeneous background. In Hungary we could not find reports about big paediatric population with GBS. Patient and method - We analysed retrospectively the data of 38 children diagnosed and treated with GBS at the Neurological Department of Paul Heim Children’s Hospital or at the Paediatric Department of St. László Hospital from January 2000 till April 2008. We analysed the clinical characteristics, seriousness of clinical signs, laboratory results, and electrophysiological features of them as well documented the preceding illness. We observed the effectiveness of our treatment; we measured the speed and time of the healing process and documented the residual clinical signs. Results - 35 children could be classified as having acute inflammatory demyelinating polyneuropathy (AIDP), 2 as having acute motor axonal neuropathy (AMAN) and 1 as Miller-Fisher syndrome. By those patients who at the very beginning did not show the characteristic clinical signs, electrophysiology helped in establishing the diagnosis. By one child spinal MRI with gadolinium supported our diagnosis. Those children, who lost their ambulation, got immunotherapy: intravenous immunoglobulin (IVIG) or plasmapheresis (PEX). Both method seemed to be effective. None of our patients died. All were cured. By five patients residual clinical symptoms could be found. Conclusion - The disease process, the relative incidence of each subtype of GBS is nearly similar to that in Western Europe and North America according to the literature. By the currently used immune therapy most of the pediatric patients recover fully within a short time.]

All articles in the issue

Related contents

Clinical Neuroscience

[The applicability of 123I-FP-CIT SPECT dopamine transporter imaging in clinical practice]

JANSZKY József, KOVÁCS Norbert, ASCHERMANN Zsuzsanna, ZÁMBÓ Katalin, PERLAKI Gábor, SZEKERES Sarolta, DEZSŐ Dániel

[The 123I-FP-CIT dopamine transporter SPECT imaging is a sensitive method to assess functional dopaminergic neuron terminals in the striatum. The method has also been available in Hungary for years. There are two main indications: (i) to help differentiate essential tremor from clinically uncertain Parkinsonism, including patients with early symptoms and (ii) to help differentiate dementia with Lewy bodies from Alzheimer’s disease. The aim of this paper is to review 123I-FP-CIT SPECT imaging based on international data/guidelines and our own experiences, thereby assisting nuclear medicine practitioners and neurologists.]

Clinical Neuroscience

[Childhood sporadic type of hemiplegic migraine with arteria cerebri media hypoperfusion]

NAGY Ferenc, BAJZIK Gábor, VAJDA Zsolt, NAGY Csaba, SKOBRÁK Andrea, CSORBA Eszter, LAJTAI Anikó, BALOGH Gábor

[Hemiplegic migraine is a rare subtype of migraine that is associated with reversible motor weakness in the aura phase. This is an uncommon form of migraine usually starting in childhood. The purpose of this case report is to highlight the differential diagnostic difficulty of the first attack. We describe a case, where the fluctuating unilateral motor weakness and aphasia suggested that the patient had ischaemic stroke. Nevertheless the brain MRI and MR angiography, the measured 5-hydroxyindole acetic acid (5-HIAA) concentration changes and the spontaneously improving clinical status proved the diagnosis of hemiplegic migraine. The MRI and MR angiography was very beneficial in establishing the correct diagnosis in this case. To distinguish between the familiar and sporadic type of hemiplegic migraine further genetic tests can be carried out.]

Clinical Neuroscience

Cerebral cavernous malformation type 1 with retinal blood vessel tortuosity and KRIT1 gene mutation

KÁLOVITS Ferenc, KALMÁR Tibor, MARÓTI Zoltán, VADVÁRI Árpád, HALMOSI Ágnes, KÁLMÁN Bernadette

Cerebral cavernous malformations (CCMs) represent a relatively rare and heterogeneous clinical entity with mutations identified in three genes. Both sporadic and familial forms have been reported. We present a young female patient with episodic paresthesia and headaches, but without acute neurological deficits. Her mother had a hemorrhaged cavernoma surgically removed 21 years ago. Cranial magnetic resonance imaging revealed multiple cavernous malformations in the size of a few millimeters and the ophthalmologic exam detected retinal blood vessel tortuosity in the proband. Targeted exome sequencing analysis identified a nonsense mutation in exon 16 of the KRIT1 gene, which resulted in a premature stop codon and a truncated protein underlying the abnormal development of cerebral and retinal blood vessels. This mutation with pathogenic significance has been reported before. Our case points to the importance of a thorough clinical and molecular work up despite the uncertain neurological complaints, since life style recommendations, imaging monitoring and genetic counseling may have major significance in the long term health of the patient.

Clinical Neuroscience

Long-term follow-up results of concomitant chemoradiotherapy followed by adjuvant temozolomide therapy for glioblastoma multiforme patients. The importance of MRI information in survival: Single-center experience

BAJZIK Gábor, KOVÁCS Árpád, HADJIEV Janaki, REPA Imre, SEMJÉN Dávid, TÓTH Zoltán, LUKÁCS Gábor, SIPOS Dávid, CSIMA Melinda, CSELIK Zsolt

Introduction - Glioblastoma multiforme (GBM) is the most common malignant primary anomaly of central nervous system. The GBM infiltrates the nearly sturctures from the initial tumor and its metastatic attribution is well known. The aim of our single-centered retrospective study was to introduce the importance of postoperative medical imaging confirmation of total tumor resection for patient with GBM combined concomitant and adjuvant chemoradiotherapy on a 10 year long patient follow up. Methods - From January 2006 to April 2015 we registered 59 patients with newly diagnosed GBM at the University of Kaposvár Health Center Institute of Diagnostic Imaging and Radiation Oncology. The histological diagnosis was confirmed by a proficient neuropathologist (World Health Organisation WHO; grade IV astrocytoma). According to histological status if the ECOG performance status of patients allowed it the mutidisciplinary oncoteam recommended adjuvant chemoradiotherapy all features strictly by Stupp protocol. (60 Gy dose on the gross tumor volume and 2-3 cm margin for the clinical target volume with parallel 75 mg/m2 TMZ. Four weeks after monotherapial phase patients had to recieve 6 cycles of TMZ first cycle with 150 mg/m2 up to 200 mg/m2). The irradiation was carried out by a conformal three dimensional planning system. Results - 59 patients with the median age of 63 (range 17-84) year. Our sample counted 34 male patients and 25 woman patients. 14 patients underwent gross total tumor resection while, 39 patients underwent partial resection and the rest from our sample 6 patients passed through biopsy. Statistical analysis showed a lengthier survival among males than females, with a median survival of 13 months for males and females, the OS of 26.209 for males, meanwhile 15.625 for females. However, the difference is not considerable (log-rank p=0.203). Our study found that the estimated survival of patients at least 50 years old is significantly shorter at a median survival of 12 months (log rank p=0.027) than that of patients below 50 years of age at a median survival of 23 months. The longest estimated median survival was calculated with patients of ECOG '0' condition (16 months). However, no significant difference was found in the estimated survival of patients of different ECOG conditions (log-rank p=0.146). Based on the extent of surgery, complete resection resulted in the longest average survival of 36.4 months, followed by 21.5 months among patients with biopsy, and 15.8 months among patients with partial resection. Different surgical procedures, however, did not result in significant differences in survival (log-rank p=0.059). The overal survival of patients who had complete resection confirmed by MRI compared with the overal survival of patients with residual tumor confirmed by MRI as well we can estimate that there is significant difference between these two groups (p=0,004). Conclusion - Despite complex and intense treatment, recurrence is inevitable and causes relatively rapid death. In our analysis complete resection, as defined from the neurosurgeon’s report and postoperative MRI, resulted in an independently significant improvement in OS. Our results are the evidences that the treatment of patients with glioblastoma multiforme in Hungary is at least on the same level as any other developed European countries.

Clinical Neuroscience

[Simultaneous occurrence of cavernous angioma and developental venous anomaly]

VÖRÖS Erika, KUNCZ Ádám, BODOSI Mihály

[The significance of the simultaneous occurrence of cavernous angioma and developmental venous anomaly, the diagnostic possibilities and the surgical treatment are discussed based upon three cases. Angiography and magnetic resonance imaging together are necessary to get an accurate diagnosis. According to the literature and to the fact that it is the cavernous angioma that mainly causes the symptoms, the cavernosus angioma should be resected, while the developmental venous anomaly should be spared.]