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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Neurosurgical review 1 (1978), S. 5-13 
    ISSN: 1437-2320
    Keywords: Pituitary adenoma ; Microsurgery ; Neuroendocrinology ; Computerized tomography ; Hypophysenadenom ; Mikrochirurgie ; Neuroendokrinologie ; Computer-Tomographie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Fortschritte in der Hypophysenchirurgie basieren auf der mikrochirurgischen Technik, der endokrinologischen Funktionsdiagnostik sowie der Computer-Tomographie. Das mikrochirurgische Vorgehen hat den transsphenoidalen Zugang mit selektiver Adenomektomie ermöglicht. Darüber hinaus empfiehlt sich dieser Operationsweg auch bei symmetrisch suprasellär aus der Sella herausgewachsenen Geschwülsten. Endokrinologisch lassen sich mit Hilfe der Funktionsdiagnostik Hypophysen-Insuffizienzen und Hormon-Exzesse, die alle Vorderlappenhormone betreffen können, exakt bestimmen; als inaktiv gelten heute nur noch etwa 30% der Adenome. Von diesen Ergebnissen hängt die Indikation zur Operation, die Art und das Ausmaß des operativen Eingriffs ab. Darüber hinaus läßt sich der Operationserfolg endokrinologisch kontrollieren; auf diese Weise ist z. B. in der Behandlung der Akromegalie eine Normalisierung des GH-Exzesses bei 90% der intrasellären Adenome erreicht worden. Die selektive Adenomektomie hat auch die Behandlung des hypothalamisch/hypophysären Cushing-Syndroms bereichert und bei Frauen mit hyperprolaktinämischer Amenorrhoe und Kinderwunsch die Wiedererlangung ovarieller Zyklen und Schwangerschaften ermöglicht. Für die Prolaktinome zeichnet sich erstmals eine erfolgversprechende medikamentöse Therapie der Hypophysenadenome ab. Zur Lokalisation und Bestimmung der Ausdehnung der Geschwülste ist die Computer-Tomographie die entscheidende Untersuchung, welche die Wahl des operativen Zugangs (transsphenoidal, transkranial) bestimmt und postoperativ die Radikalität des Eingriffs belegt und im Falle verbliebener Tumorreste zu einer zweiten Operation, u. U. auf dem anderen Operationsweg, Anlaß geben kann.
    Notes: Summary Progress in pituitary surgery has arisen with the introduction of microsurgical technique, endocrinological functional tests and computerized tomography of the skull. Using such microsurgical procedures, the transsphenoidal approach to the sella with selective adenomectomy is rendered possible. Furthermore, this operative approach is recommended also for pituitary tumours growing symmetrically to the suprasellar region. Endocrinological functional tests permit exact measurement of pituitary insufficiency and hormonal excesses, including all hormones of the anterior pituitary; today, only 30% of the adenomas are regarded as hormonally inactive. The indication to operate, the approach and the extent of the operative procedures depend on these results. Further, the operative result can be controlled by endocrine tests; in this way treatment of acromegaly can be improved: in patients with intrasellar adenomas GH-excess can be normalized in 90% of the patients. Selective adenomectomy has also improved the treatment of Cushing's disease. In women with hyperprolactinemic amenorrhea, who wished to have children, ovarian cycles and pregnancy occurred. In the case of prolactinomas, for the first time medical treatment of pituitary adenomas has been successful. Computerized tomography of the skull is the most important examination in order to localize a tumour and to determine its extent whereby the operative procedure (transsphenoidal, transcranial) is decided. After operation, the radicality of the operation can thus be documented and in the case of tumour residuals a second operation may then be indicated.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Neurosurgical review 5 (1982), S. 99-105 
    ISSN: 1437-2320
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Neurosurgical review 5 (1982), S. 63-63 
    ISSN: 1437-2320
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Neurosurgical review 6 (1983), S. 5-5 
    ISSN: 1437-2320
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 322 (1968), S. 251-258 
    ISSN: 1435-2451
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neural transmission 35 (1974), S. 241-254 
    ISSN: 1435-1463
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Two of the main biochemical features characteristic for oncogenic RNA (oncorna) viruses have been detected in human glioblastoma. In all tumors tested so far a RNA instructed DNA polymerase (“reverse transcriptase”) activity was present which exhibited the criteria specific for oncorna viruses. It was stimulable by the synthetic polynucleotide poly-rA: oligo-dT, it was almost insensitive to actinomycin D but very sensitive to ethidiumbromide. Using the simultaneous detection test, a high molecular weight RNA species was found in the subcellular fraction with the highest reverse transcriptase activity. As revealed by electron microscopy, this subcellular fraction contains particles of a morphology similar to oncogenic RNA viruses of the C-type.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 11 (1964), S. 716-730 
    ISSN: 0942-0940
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary It may be shown that among the pituitary adenomata the so-called “mixed” adenoma was especially inclined to recurrence. Ninety per cent of the recurrent tumours which we have observed were mixed adenomata. The recurrence usually develops within 5 years after the treatment. The eye symptoms, as well as the radiological evidence of an expanding lesion in the region of the sella, are as important for detecting the onset of the recurrence as they were for diagnosis before the first operation. Anterior pituitary insufficiency is more frequent with the recurrent lesions. Because the onset of A. C. T. H. insufficiency is manifested relatively late, the eye signs assume a critical importance in the early diagnosis of recurrences. In this respect, the most useful information is to be derived from the Perimeter. In order to avoid recurrences, intensive postoperative radiation of the mixed adenomata should be requested as part of the initial therapy.
    Abstract: Résumé Il peut être démontré que pour les adénomes hypophysaires l'adénome dit ≪mixte≫ est particuliérement enclin á récidiver. Quatre-vingt-dix pour cent des tumeurs récidivantes que nous avons observées étaient des adénomes mixtes. La récidive habituelle se développe moins de 5 ans aprés le traitement. Les symptômes oculaires, de même que les preuves radiologiques d'une lésion expansive de la région de la selle, sont aussi importants pour détecter la récidive qu'ils l'étaient pour le diagnostic avant la premiére intervention. L'insuffisance pituitaire antérieure est plus fréquente lors des récidives. Parce que l'insuffisance en A. C. T. H. se manifeste relativement tard, les signes oculaires prennent une importance critique dans le diagnostic précoce des récidives. A cet égard, la plus utile information proviendra du champ visuel. Dans le but d'éviter les récidives, une irradiation postopératoire intensive des adénomes mixtes doit être demandée comme un élément de la thérapeutique initiale.
    Notes: Zusammenfassung Es konnte gezeigt werden, daß unter den Hypophysengeschwülsten das sogenannte Mischtypadenom besonders zur Rezidivierung neigt. Zirka 90% der von uns beobachteten Rezidivtumoren waren mischzellige Adenome. Das Rezidiv trat vorwiegend innerhalb von 5 Jahren nach dem Eingriff auf. Die Augensymptome sowie die röntgenologisch faßbaren Veränderungen im Sellabereich waren zum Zeitpunkt des Rezidivs wesentlich ausgeprägter als vor der Erstoperation, und es bestand mit überwiegender Häufigkeit eine Hypophysen-Vorderlappeninsuffizienz. Da sich der Ausfall der corticotropen Vorderlappenfunktion erst relativ spät manifestiert, kommt für die Frühdiagnose des Rezidivtumors den Augenbefunden, insbesondere der Funktionsprüfung, die entscheidende Bedeutung zu. Die wertvollsten Hinweise gibt hierbei die Untersuchung am Perimeter. Zur Verhütung des Rezidivs muß beim Mischtypadenom eine intensive Nachbestrahlung im Anschluß an die Erstoperation gefordert werden.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 13 (1965), S. 138-144 
    ISSN: 0942-0940
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 0942-0940
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A total of 47 neurosurgical patients with brain tumours have been studied. Twenty of them were not specifically treated for brain oedema before the operation and are being regarded as controls. In the other 27 patients aldosterone was given pre- and postoperatively for several days in a dose of 2×5 mg per day. During the operation, tissue samples from the vicinity of the tumour, including cortex and white matter, were removed and subjected to analysis of the following: water content, electrolytes (Na, K) and labile metabolites (CP, ATP, ADP, AMP, Pyr., Lact.). When comparing the two groups, a reduction of water content was found in the aldosterone group with a statistical significance at p 0.005. Na was at lower values in both brain compartments in the treated group, whereas K was found to be slightly elevated above the level of the controls. Metabolites showed only minor changes when the 2 groups were compared. From the clinical point of view, patients responded favourably to aldosterone therapy. In no case did treatment with aldosterone result in untoward side effects.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 9 (1960), S. 152-156 
    ISSN: 0942-0940
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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