Search Results - (Author, Cooperation:L. Bognar)

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  1. 1
    P. A. Northcott ; D. J. Shih ; J. Peacock ; L. Garzia ; A. S. Morrissy ; T. Zichner ; A. M. Stutz ; A. Korshunov ; J. Reimand ; S. E. Schumacher ; R. Beroukhim ; D. W. Ellison ; C. R. Marshall ; A. C. Lionel ; S. Mack ; A. Dubuc ; Y. Yao ; V. Ramaswamy ; B. Luu ; A. Rolider ; F. M. Cavalli ; X. Wang ; M. Remke ; X. Wu ; R. Y. Chiu ; A. Chu ; E. Chuah ; R. D. Corbett ; G. R. Hoad ; S. D. Jackman ; Y. Li ; A. Lo ; K. L. Mungall ; K. M. Nip ; J. Q. Qian ; A. G. Raymond ; N. T. Thiessen ; R. J. Varhol ; I. Birol ; R. A. Moore ; A. J. Mungall ; R. Holt ; D. Kawauchi ; M. F. Roussel ; M. Kool ; D. T. Jones ; H. Witt ; L. A. Fernandez ; A. M. Kenney ; R. J. Wechsler-Reya ; P. Dirks ; T. Aviv ; W. A. Grajkowska ; M. Perek-Polnik ; C. C. Haberler ; O. Delattre ; S. S. Reynaud ; F. F. Doz ; S. S. Pernet-Fattet ; B. K. Cho ; S. K. Kim ; K. C. Wang ; W. Scheurlen ; C. G. Eberhart ; M. Fevre-Montange ; A. Jouvet ; I. F. Pollack ; X. Fan ; K. M. Muraszko ; G. Y. Gillespie ; C. Di Rocco ; L. Massimi ; E. M. Michiels ; N. K. Kloosterhof ; P. J. French ; J. M. Kros ; J. M. Olson ; R. G. Ellenbogen ; K. Zitterbart ; L. Kren ; R. C. Thompson ; M. K. Cooper ; B. Lach ; R. E. McLendon ; D. D. Bigner ; A. Fontebasso ; S. Albrecht ; N. Jabado ; J. C. Lindsey ; S. Bailey ; N. Gupta ; W. A. Weiss ; L. Bognar ; A. Klekner ; T. E. Van Meter ; T. Kumabe ; T. Tominaga ; S. K. Elbabaa ; J. R. Leonard ; J. B. Rubin ; L. M. Liau ; E. G. Van Meir ; M. Fouladi ; H. Nakamura ; G. Cinalli ; M. Garami ; P. Hauser ; A. G. Saad ; A. Iolascon ; S. Jung ; C. G. Carlotti ; R. Vibhakar ; Y. S. Ra ; S. Robinson ; M. Zollo ; C. C. Faria ; J. A. Chan ; M. L. Levy ; P. H. Sorensen ; M. Meyerson ; S. L. Pomeroy ; Y. J. Cho ; G. D. Bader ; U. Tabori ; C. E. Hawkins ; E. Bouffet ; S. W. Scherer ; J. T. Rutka ; D. Malkin ; S. C. Clifford ; S. J. Jones ; J. O. Korbel ; S. M. Pfister ; M. A. Marra ; M. D. Taylor
    Nature Publishing Group (NPG)
    Published 2012
    Staff View
    Publication Date:
    2012-07-27
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Carrier Proteins/genetics ; Cerebellar Neoplasms/*classification/*genetics/metabolism ; Child ; DNA Copy Number Variations/genetics ; Gene Duplication/genetics ; Genes, myc/genetics ; Genome, Human/*genetics ; Genomic Structural Variation/*genetics ; Genomics ; Hedgehog Proteins/metabolism ; Humans ; Medulloblastoma/*classification/*genetics/metabolism ; NF-kappa B/metabolism ; Nerve Tissue Proteins/genetics ; Oncogene Proteins, Fusion/genetics ; Proteins/genetics ; RNA, Long Noncoding ; Signal Transduction ; Transforming Growth Factor beta/metabolism ; Translocation, Genetic/genetics
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  2. 2
    J. Schwartzentruber ; A. Korshunov ; X. Y. Liu ; D. T. Jones ; E. Pfaff ; K. Jacob ; D. Sturm ; A. M. Fontebasso ; D. A. Quang ; M. Tonjes ; V. Hovestadt ; S. Albrecht ; M. Kool ; A. Nantel ; C. Konermann ; A. Lindroth ; N. Jager ; T. Rausch ; M. Ryzhova ; J. O. Korbel ; T. Hielscher ; P. Hauser ; M. Garami ; A. Klekner ; L. Bognar ; M. Ebinger ; M. U. Schuhmann ; W. Scheurlen ; A. Pekrun ; M. C. Fruhwald ; W. Roggendorf ; C. Kramm ; M. Durken ; J. Atkinson ; P. Lepage ; A. Montpetit ; M. Zakrzewska ; K. Zakrzewski ; P. P. Liberski ; Z. Dong ; P. Siegel ; A. E. Kulozik ; M. Zapatka ; A. Guha ; D. Malkin ; J. Felsberg ; G. Reifenberger ; A. von Deimling ; K. Ichimura ; V. P. Collins ; H. Witt ; T. Milde ; O. Witt ; C. Zhang ; P. Castelo-Branco ; P. Lichter ; D. Faury ; U. Tabori ; C. Plass ; J. Majewski ; S. M. Pfister ; N. Jabado
    Nature Publishing Group (NPG)
    Published 2012
    Staff View
    Publication Date:
    2012-01-31
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Adaptor Proteins, Signal Transducing/genetics ; Base Sequence ; Child ; Chromatin/*genetics/metabolism ; Chromatin Assembly and Disassembly/*genetics ; DNA Helicases/genetics ; DNA Mutational Analysis ; Exome/genetics ; Gene Expression Profiling ; Glioblastoma/*genetics ; Histones/*genetics/metabolism ; Humans ; Molecular Sequence Data ; Mutation/*genetics ; Nuclear Proteins/genetics ; Telomere/genetics ; Tumor Suppressor Protein p53/genetics
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  3. 3
    ADAM, E. ; KOZMA-BOGNAR, L. ; SCHAFER, E. ; NAGY, F.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1997
    Staff View
    ISSN:
    1365-3040
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Biology
    Notes:
    Photomorphogenesis in tobacco, like in other higher plant species, is regulated by at least three different types of photoreceptors, among which the best characterized is phytochrome. Three genes, designated Nt-PHYA1, Nt-PHYA2 and Nt-PHYBl, have been isolated from the allotetraploid Nicotiana tabacum encoding phytochrome A (phyA)-like and phytochrome B (phyB)-like apoproteins, respectively. The deduced amino acid sequences of the encoded tobacco phyA and B proteins exhibit significant homology (〉75%) to phyA and phyB proteins described in Arabidopsis and in other plant species including potato, tomato and pea. Expression patterns and levels of the tobacco PHYA- and PHYB-like genes have been characterized in detail. Expression of the PHYB1 gene is regulated mainly, while that of the PHYA genes is regulated partially, at the level of transcription, which is initiated at multiple start sites and produces at least three different types of transcripts differing in length and abundance. Analysis of trans-genic tobacco plants showed that expression patterns of the Nt-PHYA/GUS and Nt-PHYB/GUS transgenes exhibit well-defined organ/tissue-specific patterns. Transcription of the endogenous Nt-PHYA genes as well as of the Nt-PHYA/GUS transgenes is down-regulated by light, and this regulation is mediated by phytochrome. Expression of the Nt-PHYB gene is insensitive to light. Expression of several light-induced tobacco genes is mediated by phytochrome and further modulated by a circadian clock. Although phytochrome plays a significant role in synchronizing/setting this endogenous oscillator, transcription of the Nt-PHYA and Nt-PHYB genes is not regulated by the circadian rhythm in developing tobacco seedlings. In the absence of well-characterized mutants, the precise biological function of tobacco phyA and phyB molecules, in contrast to the phyA and phyB proteins in Arabidopsis, is not yet understood.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  4. 4
    Staff View
    ISSN:
    0942-0940
    Keywords:
    Unruptured aneurysm ; operation ; indication ; outcome
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Summary The authors report a series of 37 cases of unruptured aneurysms, admitted and operated upon over a 5 year period (1985–1990), which represents an incidence of 18% of the total number of aneurysm patients operated upon during this period. These unruptured aneurysms were discovered in 4 types of circumstances: 1) Associated with a ruptured aneurysm but treated in a second procedure (9 cases); 2) After a transient ischaemic attack (6 cases); 3) After a cerebral haemorrhage of a different origin (3 cases), 4) After the onset of various neurological symptoms other than SAH (19 cases). Giant aneurysms (over 2.5 cm in diameter) are excluded from this series. Overall these 37 patients harboured 52 aneurysms, and 1 patient was operated upon on both sides. 27 aneurysms (52%) were located on the right side, 15 (29%) on the left side, and 10 (19%) on the midline. In the immediate post operative period, 1 patient died (2.6%) and 8 patients (21%) presented various complications. The outcome at 6 months was: death 2.6%, moderately disabled 8%, good recovery 89%. The arguments in favour of, or against, the surgical treatment of unruptured aneurysms are discussed in view of the literature. In favour of prophylactic surgery are: 1) The rather poor overall outcome following aneurysm rupture (including deaths before admission); 2) The rather good outcome of surgery in published series of unruptured aneurysms. The data of the natural history of the unruptured aneurysm are more questionable: in this view, surgery seems to be recommended in young patients with an easily accessible aneurysm and being in a good clinical condition. Several contra indications should be strictly accepted: severe associated diseases, age (over 65 and sometimes over 60), patient's refusal or reluctance. In cases of unruptured aneurysms to be operated upon in a second procedure after a ruptured aneurysm, the authors usually wait for 2 months or more before the second operation.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  5. 5
    Staff View
    ISSN:
    0942-0940
    Keywords:
    Aneurysm rupture ; subarachnoid haemorrhage ; timing of surgery
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Summary The prognostic value of the level of consciousness and the patient's age for the outcome of aneurysmal subarachnoid haemorrhage (SAH) is studied in 74 patients admitted on day (D)0 to D3 after aneurysm rupture. For the level of consciousness three groups of patients are compared: grade I+II (alert patients), grade III+IV (drowsy patients), and grade V (comatose patients). For the age, two groups are compared: patients aged under 50, and patients aged 50 and over. The timing of surgery was: D0–D3 51%, D4–D6 20%, D7 and later 18%, and No surgery 11%. The overall management results were: Good (satisfactory result) 43%, Fair (moderately disabled) 18%, Poor (severely disabled+vegetative survival) 19%, and Death 20%. The outcome was strongly related to the level of consciousness, the rates of Good result decreasing from 71% (grades I–II) to 14% (grades III–IV) and to zero (grade V), and the mortality rates increasing respectively from 5% to 14% and 61%. The relationship between outcome and age was less marked: 54% Good result under 50 and 30% over 50. Out of the Grade V group, 56% could be operated upon and 44% died before surgery. No patient from the other two groups died before surgery. The literature concerning the Grading Systems published so far and the various prognostic factors are discussed.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  6. 6
    Staff View
    ISSN:
    0942-0940
    Keywords:
    Tectal plate gliomas ; microsurgery ; aqueductal stenosis
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Summary A series of 12 patients with tectal plate gliomas, is presented treated by direct surgery. Mean age was 19 years. All patients presented with signs of raised intracranial pressure and supratentorial hydrocephalus on CT scan. Diplopia was the most common local sign. CT scan and MR imaging showed 4 intrinsic, 6 exophytic, and 2 ventrally infiltrating tectal tumours. The histological diagnosis was low-grade astrocytoma in 7, high-grade astrocytoma in 2, oligodendroglioma in one, oligo-astrocytoma in one, and ependymoma in one case. The suboccipital supra- and transtentorial approach was used in every cases. Tumour resection was generous at the level of the superior colliculi, but on the contrary, resection was limited at the level of inferior colliculi due to the auditory risk. Tumour removal was total (macroscopically) in 9 cases and partial in 3 cases. There were 4 surgical complications and one death related to surgery. Parinaud's syndrome was the most-common postoperative sequelae. Auditory hallucinations and the acoustic neglect syndrome were seen once. In three cases additional radiotherapy and chemotherapy were given once with severe sequelae. The treatment of tectal plate gliomas is controversial. The role of different therapeutic options remains open. We consider the tectal plate as a relatively safer territory for surgery than the ventral part of the midbrain. The brain stem auditory evoked potentials (BAEPs) and middle latency potentials (MLPs) monitoring can help to determine the appropriate limit of surgery.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  7. 7
    Bognàr, L. ; Szeifert, G. T. ; Fedorcsàk, I. ; Pàsztor, E.
    Springer
    Published 1992
    Staff View
    ISSN:
    0942-0940
    Keywords:
    Rathke's cleft cyst ; pituitary ; abscess
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Summary Two patients are discussed who presented at our Institute with endocrine dysfunction and sellar enlargement. CT scans revealed intra and suprasellar expanding lesions with ring enhancement. The postoperative histological examination showed remnants of Rathke's cleft cyst together with signs of inflammation. CT and MRI pictures, and possible mechanisms of abscess formation in this region are discussed.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  8. 8
    Staff View
    ISSN:
    0942-0940
    Keywords:
    Brain-stem auditory evoked potentials (BAEPs) ; middle latency potentials (MLPs) ; inferior colliculus (I.C.) ; Dichotic test ; tectal plate astrocytoma
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Summary The authors present one of their cases operated on for intrinsic tectal plate glioma. The complete resection of the right inferior colliculus (I.C.) had no apparent auditory consequences. The pre- and post-operative tonal and vocal auditory tests were normal. The brain-stem auditory evoked potentials (BAEPs) and middle latency potentials (MLPs) were recorded pre-, post- and intra-operatively. At the end of surgery all waves were present with a marked delay of wave V and a slight delay of the Pa component. The dichotic test showed a significant right ear extinction but admittedly much less important than expected. The role of inferior colliculus (I.C.) in hearing is discussed.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  9. 9
    Staff View
    ISSN:
    0942-0940
    Keywords:
    CT ; MRI ; tectal plate astrocytoma
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Summary CT scans and MR images were analized in 12 patients with histologically proved tectal plate gliomas. In an attempt to identify the nature of these lesions, their radiological characteristics were correlated with the histological results. In four of our patients CT scan failed to show the tumour. MR imaging demonstrated the tectal distorsion in all cases. Contrast enhancement, calcification, cystic portions, exophytic nature were observed in both high and low-grade gliomas. We conclude that in the case of intrinsic tectal tumours, the most probable diagnosis is that of low-grade astrocytoma while in the case of exophytic tectal tumours, the differential diagnosis from pineal region tumour is required and a histological verification is necessary.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  10. 10
    Staff View
    ISSN:
    1573-7373
    Keywords:
    radiosurgery ; surgery ; malignant melanoma ; brain metastases
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Summary A case of malignant melanoma with multiplex brain metastases is described, where both surgical and radiosurgical treatment was applied. Due to CNS manifestations the patient was operated on in two sessions. First the symptomatic large tumor was removed, and the other, small lesion which could not be reached from the same approach was operated later. The primary skin lesion was discovered and removed between the two operations. A CT scan three months after the second operation revealed recurrence at the site of the first operation, and the appearance of two new tumors. The intracranial neoplasms were treated in one session by stereotactic radiosurgery using a linear accelerator. Six months after this treatment a new skin lesion was removed and the patient received DTIC therapy. Successive CT scans after the irradiation showed a steady regression of the radiosurgically treated tumors, and more than one year after the irradiation no tumor could be detected on the CT scans.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses