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  • 1
    ISSN: 0942-0940
    Keywords: Cancer ; spinal cord compression ; occurrence ; symptoms ; diagnosis ; treatment and prognosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We reviewed all medical records concerning patients suffering from spinal cord or cauda equina compression (SCC) secondary to cancer, in the eastern part of Denmark, from 1979 through 1985. During the period the incidence of SCC in cancer patients went up from 4.4% to 6%. However, this increase was not significant. The series comprised 398 cases, with carcinoma of the prostate (19%), lung (18%), breast (14%) and kidney (10%) accounting for 61%. The symptoms were evaluated in accordance with the patients rating of pain, motor deficits, sphincter control and paraesthesia, whereas the clinical manifestations were classified on the basis of motor deficit and bladder dysfunction. During the period preceding the diagnosis of SCC, 83% of the patients suffered from back pain, 67% from deteriorating gait and 48% had retention of the urine. In 35% of the patients there was no sphincter disturbance and 10% had normal sensory function. The outcome of treatment was estimated by changes in motor deficits and sphincter function, and depended primarily on the patients condition at the time of the diagnosis. Of the patients who were able to walk before treatment, 79% remained ambulatory, wheras only 18% of the non-ambulatory patients regained walking ability. Patients treated by decompressive laminectomy followed by radiotherapy apparantly had a better response than patients treated with surgery or irradiation alone, but when the patients pre-treatment motor function was taken into account, no significant difference was observed. The study may call for a properly randomized trial with careful stratification of tumour biology, performance status and neurological deficits.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0942-0940
    Keywords: Experimental subarachnoid haemorrhage ; cerebral autoregulation ; cerebral blood flow ; cerebral vasospasm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Haemodynamic instability is of great importance in clinical management of patients with subarachnoid haemorrhage (SAH). The significance of angiographically demonstrable vasospasm for disturbances of cerebral blood flow (CBF) and cerebral autoregulation has not yet been clarified. The present study was designed to describe disturbances of cerebral autoregulation during the timecourse of experimental SAH (eSAH) in rats. A second aim of the study was to relate the results to a reported timecourse of angiographic vasospasm in the same animal model. Previous studies have shown that the timecourse of angiographically visible vasospasm in eSAH is biphasic with maximal spasm at 10 min and 2 days after induction of eSAH. At 5 days, the vasospasms have resolved. CBF was measured using a133-Xenon intracarotid injection method which allowed serial measurements of mean hemispheric CBF during controlled manipulations of arterial blood pressure. In this way, an autoregulation curve could be constructed. The present study shows that autoregulation is severely disturbed or even totally absent at 2 and 5 days after eSAH. Thus there seems to be no direct correlation between presence of angiographic vasospasm and impairment of autoregulation, or that the impairment of autoregulation is more protracted than the presence of cerebral vasospasm, presuming a correlation exist.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 123 (1993), S. 1-7 
    ISSN: 0942-0940
    Keywords: Benign astrocytoma ; prognosis ; gemistocytes ; radiotherapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To elucidate the prognosis of different types of benign astrocytomas and to ascertain whether patients with partially resected benign astrocytomas, or any subtype of these, would benefit from postoperative radiotherapy, we studied retrospectively material comprising 300 patients with benign astrocytomas treated in the period 1956 to 1991. The pilocytic type of astrocytoma was found to have an outstandingly good prognosis and should be regarded as a distinct nosological entity. For the non-pilocytic supratentorial astrocytomas, a multivariate regression analysis showed that age, tumour site, Kernohan grade and lymphocytic perivascular cuffing influenced survival. The proportion of gemistocytes increased with age. After correction for age, the proportion of gemistocytes had no significant influence on survival. It was not possible to demonstrate any influence of radiotherapy on median survival time of patients with non-pilocytic supratentorial benign astrocytomas. The study emphasizes the necessity of a prospective combined multicenter analysis of the effect of radiation on benign astrocytomas.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 139 (1997), S. 600-605 
    ISSN: 0942-0940
    Keywords: Oligodendroglioma ; prognosis ; surgery ; radiotherapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary An outcome analysis was performed on 96 patients with pure cerebral oligodendrogliomas operated in the 30-year period 1962 to 1991. The most important predictive prognostic factors were youth and no neurological deficit, demonstrated as a median survival for the group younger than 20 years of 17.5 years and for the group older than 60 years of 13 months. The group without neurological deficits had a 5-years survival of 43 per cent while the group with deficits had a 5-years survival of 5 per cent. The 5-years survival for oligodendroglioma of grade II was 46 per cent and for grade III 10 per cent. We found no effect of radiotherapy on survival, neither in the whole material or in any subgroup.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 0942-0940
    Keywords: Keywords: Brain biopsy; cerebrospinal fluid pressure; normal pressure hydrocephalus; meninges; resistance to CSF outflow.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary  Normal Pressure Hydrocephalus (NPH) is a potentially treatable syndrome with abnormal cerebrospinal fluid dynamics. Meningeal fibrosis and/or obliteration of the subarachnoid space have been suggested as one of the patho-anatomical substrates. However, other types of adult onset dementia, predominantly Alzheimer's disease and Vascular Dementia, may mimic the clinical NPH characteristics.  The purpose of the present study was to correlate cerebral parenchymal and leptomeningeal biopsy findings to the clinical outcome after CSF shunting in a prospective group of idiopathic NPH (INPH) patients. The study comprises 27 patients with INPH, diagnosed and shunted according to generally accepted clinical, imaging and hydrodynamic criteria. In all patients a frontal leptomeningeal and brain biopsy was obtained prior to the shunt insertion.  Degenerative cerebral changes, most often Alzheimer (6 cases) or vascular changes (7 cases) were described in 14 out of 27 biopsies. Arachnoid fibrosis was found in 9 of the 18 biopsies containing arachnoid tissue. Overall, nine patients (33%) improved, of whom 6 presented Alzheimer or vascular changes in their biopsies. No correlation was found between clinical outcome and the presence or absence of degenerative cerebral changes and/or arachnoid fibrosis. However, a tendency towards higher improvement rates was noted in the subgroups presenting degenerative cerebral changes or arachnoid fibrosis. The results suggest that no constant morphological element exists in the syndrome of INPH. Various aetiologies may be involved in the pathogenesis and possibly in some cases co-existing: Patients may also improve by shunting despite the presence of degenerative cerebral parenchymal changes.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 77 (1985), S. 46-51 
    ISSN: 0942-0940
    Keywords: Intracranial pressure ; cerebrospinal fluid vasopressin ; plasma vasopressin ; hydrocephalus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The response of plasma and ventricular cerebrospinal fluid vasopressin concentration to short-time induced intracranial hypertension was studied in 8 patients with hydrocephalus, defined as ventricular enlargement on computerized tomography. In connection with measurement of conductance to cerebrospinal fluid outflow, the concentration of vasopressin in plasma and cerebrospinal fluid was measured during perfusion at a low (〈l0mmHg) and at a high (〉20 mmHg) intraventricular pressure level. Mean plasma vasopressin concentration was increased from 2.4±0.4pg/ml (SEM) during perfusion at the low pressure level to 4.2±0.8 pg/ml (p〈0.01) at the high pressure level. The cerebrospinal fluid concentrations of vasopressin at the low and high intraventricular pressure were 1.2 ±0.1pg/ml and 1.7±0.2 pg/ml (p〈0.05), respectively. However, only half of the patients responded to the increase in intraventricular pressure with an increase in cerebrospinal fluid vasopressin concentration exceeding 50%. The results of the present study suggest that an increase in the intracranial pressure might be a stimulus for vasopressin release in both the blood and the cerebrospinal fluid.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 0942-0940
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary CSF concentrations of vasoactive intestinal polypeptide (VIP), cholecystokinin (CCK), noradrenaline (NA) and dopamine (DA) were measured in the lateral ventricles and at the lumbar level in patients with normal pressure hydrocephalus (NPH). The concentrations of VIP (n=15), NA (n=10) and DA (n=10) were significantly higher at the lumbar level than at the ventricular level, whereas the concentrations of CCK (n=9) were similar at the two sites. A signifikant positive correlation between the concentrations measured at the two levels was found for VIP (rs=0.65; p⩽0.01) and DA (rs=0.94; p⩽0.001). The results indicate that the concentrations of transmitter substances measured in CSF at the lumbar level not necessarily are indicative for concentrations measured more centrally. The negative correlations between Evans ratio and L-CSF VIP (rs=-0.76; p ⩽ 0.001), and between resistance to outflow and V-CSF as well as L-CSF CCK (rs=-0.75); p ⩽0.05) might be explained by a reduction in number of cortical neurons or by disturbances in CSF dynamics in patients with NPH.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 0942-0940
    Keywords: Glucocorticoid receptor ; brain tumour ; malignant astrocytomas ; steroid treatment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Glucocorticoid receptors were measured in tissue samples from 12 patients with glioblastoma multiforme. The receptor was found in all patients. The concentration of glucocorticoid receptor was found to be high in the periphery of the tumour, low in the surrounding brain tissue and low in the central part of the tumour in 6 of the patients. The possible role of the glucocorticoid receptor distribution in relation to growth regulation is discussed. A decreasing receptor concentration found at reoperation in two patients indicates a possible antineoplastic effect of high dose methylprednisolone pulse therapy on glucocorticoid receptor positive glioblastomas.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 0942-0940
    Keywords: Subarachnoid haemorrhage ; resistance to CSF-outflow ; conductance to CSF-outflow ; CSF-dynamics ; intracranial pressure ; high pressure hydrocephalus ; normal pressure hydrocephalus ; CT-scanning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Resistance to CSF-outflow (Rout) and intracranial pressure (ICP) were measured in 33 patients with hydrocephalus after subarachnoid haemorrhage (SAH). Eleven patients examined between 10 to 30 days after SAH had high pressure hydrocephalus (HPH). Twenty-two patients had normal pressure hydrocephalus (NPH). All HPH-patients had ICP above 15 mmHg, plateau waves and B-waves, a median Rout of 59 mmHg×ml−1×min−1 (range 29–100). All NPH-patients had a normal ICP level, no plateau waves, but long periods of B-waves and a median Rout of 22 mmHg×ml−1×min−1 (range 6–47). Of the 11 patients with HPH six were shunted and five had temporary ventricular drainage. Five patients improved and six died. Of the five survivors only one went back to work. Of the 22 NPH-patients 18 were treated with a shunt, one refused shuntoperation and three had normal Rout. Seventeen improved after shunting. At followup 12 had a normal social life, 5 lived in a nursing home and 1 was dead. Thus, early development of hydrocephalus after subarachnoid haemorrhage is associated with a high Rout and a high ICP, whereas late (more than one month) hydrocephalus may be associated with normal ICP and high Rout. Patients with NPH and a high Rout have frequent B-waves and should be shunted. Patients with a long interval from subarachnoid haemorrhage to the diagnosis of hydrocephalus often have a normal ICP, low frequency of B-waves, normal CSF-dynamics and need no shunting.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 113 (1991), S. 52-56 
    ISSN: 0942-0940
    Keywords: Spine ; intervertebral discs ; fractures ; sciatica
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Three cases of fracture of the lumbar ring apophysis representing type I, II, and III are described in detail and the natural history of these fractures is discussed. The symptoms of apophyseal fractures are usually low back pain, sciatica, tension signs, and neurological deficits, thus imitating the symptoms of lumbar disc herniation. Plain radiography and magnetic resonance are often inconclusive and computed tomography is essential for the true diagnosis. An explanation of the different types of fractures, based on the osteogenesis of the human vertebra, is proposed. Recognition of these fractures is essential for proper planing of surgery, and apophyseal ring fractures must be suspected when children and young adults show signs of lumbar disc herniation.
    Type of Medium: Electronic Resource
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