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  • 2000-2004
  • 1985-1989  (2)
  • Auditory event-related potential  (1)
  • Clinical findings in 339 cases  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European archives of psychiatry and clinical neuroscience 238 (1989), S. 185-188 
    ISSN: 1433-8491
    Keywords: Auditory event-related potential ; N2 ; P3 ; Schizophrenia ; Heredity ; Children at risk
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In previous studies investigating long latency components of the event-related potential (ERP), schizophrenic patients generally showed reduced P3 amplitudes and in some studies prolonged N2 or P3 latencies. As there is a higher risk of offspring of schizophrenics than of mentally healthy parents developing this disease, the present study was intended to clarify whether ERP components (in particular the N2 and P3) differ between these two groups of children. Twelve high-risk and 12 age-matched control children (aged 9–16 years) performed an auditory oddball task in order to assess late ERP components. This task required the subject to covertly count rare target tone pips (P = 0.2) irregularly interspersed among frequent standard tone pips (P = 0.8) in two series of 400 pips. ERPs were recorded from midline electrodes (Fz, Cz, Pz). The results indicated distinctly prolonged N2 and P3 latencies in ERPs to target stimuli in children of schizophrenic patients. These findings suggest a slowed target classification in these children.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 373 (1988), S. 173-181 
    ISSN: 1435-2451
    Keywords: Merkel cell tumor ; Trabecular carcinoma ; Neuroendocrine tumor ; Neuron-specific enolase ; Cytokeratins ; Clinical findings in 339 cases ; Surgery ; Radiotherapy ; Chemotherapy ; Local recurrence ; Lymphatic metastasis ; Hematogenous metastasis ; Prognosis ; Follow-up
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wird über vier Fälle eines Merkelzelltumors mit unterschiedlichem klinischen Verlauf und Lokalisation im Gesicht und am Stamm berichtet. Bezüglich der Klinik wurden 339 Fälle eines Merkelzelltumors aus der Literatur ausgewertet. Beim Merkelzelltumor handelt es sich um einen von den Merkelschen Zellen ausgehenden neuroendokrinen Hauttumor. Er findet sich zu 47% im Kopf-Halsbereich, hat eine durchschnittliche Größe von 25 mm, liegt typischerweise über dem Hautniveau und zeichnet sich klinisch durch seine rötlich-livide Farbe aus. Aufgrund der Metastasierung und des infiltrativen Wachstums ist er als maligne einzuordnen. In 27% bestehen Lymphknotenmetastasen, in 51 % kommt es zu Lokalrezidiven und in 32% treten Fernmetastasen auf. Die Therapie der Wahl besteht in einer frühzeitigen Excision mit einem Sicherheitsabstand, wie er bei malignen Hauttumoren üblich ist. Eine Strahlensensibilität liegt vor; ob auch eine chemotherapeutische Beeinflußbarkeit besteht, ist jedoch nicht sicher.
    Notes: Summary Four cases of Merkel cell tumor located in the face or on the trunk are presented. In a literature review 339 cases were found and analysed. The Merkel cell tumor is a neuroendocrine tumor of the skin derived from the Merkel cells. It is located most often in the face and neck area. Typically, it is an exophytic node, has a red-blue color and measures 25 mm in diameter on the average. Since it is metastasizing it is a malignant tumor. Regional node metastases were found in 27%, local recurrences occur in 51%, and distant metastases were seen in 32% of the cases. The best therapy is excision with wide margins as is the rule for a malignant skin tumor. While the tumor reacts to radiotherapy, chemotherapy seems to be of no help.
    Type of Medium: Electronic Resource
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