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  • 1
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: Adrenomedullin is a potent vasodilator peptide that was originally isolated from pheochromocytoma. The production and secretion of adrenomedullin by cultured choroid plexus carcinoma cells were studied by radioimmunoassay and northern blot hybridization. Choroid plexus carcinoma is a rare malignant tumor derived from the epithelium of the choroid plexus. Immunoreactive adrenomedullin was detected in the conditioned medium of choroid plexus carcinoma cells (40.8 ± 7.5 fmol/105 cells/24 h; mean ± SEM, n = 5). Reverse-phase HPLC of the conditioned medium showed one major peak of the immunoreactive peptide eluting in the position of synthetic human adrenomedullin and two smaller peaks eluting earlier. Addition of interleukin-1β (10 ng/ml) alone or in combination with three cytokines, interferon-γ (100 U/ml), tumor necrosis factor-α (20 ng/ml), and interleukin-1β (10 ng/ml), caused significant increases in the immunoreactive adrenomedullin concentrations in the medium (∼175 and 293% of the control level, respectively). Northern blot analysis showed the expression of 1.6-kb adrenomedullin mRNA in the total RNA sample prepared from cultured choroid plexus carcinoma cells. Treatment with either interleukin-1β or the combination of three cytokines caused significant increases in levels of adrenomedullin mRNA in parallel with those in immunoreactive adrenomedullin concentrations in the conditioned medium. These findings raise a possibility that adrenomedullin is secreted from the choroid plexus and has physiological roles in the CNS via the CSF. In addition, adrenomedullin secreted from choroid plexus carcinoma may be related to the pathophysiology of the tumor.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Neurosurgical review 19 (1996), S. 217-220 
    ISSN: 1437-2320
    Keywords: Pilocytic astrocytoma ; radiation ; recurrence ; surgical resection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Pilocytic astrocytoma, when totally resected, has a favorable outcome compared to other astrocytomas. However, when residual tumor remains, the prognosis is less satisfactory. Our study addressed the issues of prognosis in cases of residual tumor and the effect of post-surgical radiation therapy on tumor recurrence. We analyzed 41 cases of pilocytic astrocytoma which were diagnosed by histologic examination. Twenty-six patients were 15 years old or younger, and 15 patients were 16 years old or older. An analysis of the relationship between age and tumor location revealed a cerebellar predominance in both age groups; however, there were more brain stem and basal ganglia tumors among adults. Overall prognosis was favorable, with a 2-year survival rate of 97.6%, 94.6% at 5 years, and 94.6% at 10 years. Children had a better prognosis than adults due to more favorable tumor location. Gross total resection resulted in the best prognosis, i.e., no recurrence during a 10-year follow-up period. Radiation treatment after surgery suppressed residual tumor. We concluded that the best treatment for pilocytic astrocytoma is: 1) total resection, if possible, followed by 2) irradiation of any residual tumor to suppress recurrence.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1437-2320
    Keywords: Cingulate gyrus ; intraventricular tumors ; lateral ventricle ; operative technique
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Surgical experience with treatment of two lateral ventricle tumors using the anterior transcingulate approach demonstrate that this route provides an excellent approach to tumors attached to the lateral wall of the anterior ventricle, without causing gross neurologic deficits, This approach deserves attention as an alternative to the transcallosal approach in selected patients.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Neurosurgical review 9 (1986), S. 279-285 
    ISSN: 1437-2320
    Keywords: Arteriovenous malformation ; cerebral protective substances ; chemical embolization ; Sendai Cocktail ; surgical treatment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The management of cerebral arteriovenous malformation (AVM) is discussed. A series of 231 cases of AVM was treated from 1961 to March 1984 in our department. The treatments of these cases are classified as total removal 169, partial removal 8, feeder clipping 14, embolization 4 and conservative 36. Results at discharge and at follow-up are analyzed and the treatments evaluated. At follow-up, no rebleeding is reported in the patients who had undergone extirpation. Cases treated with other methods showed rebleedings and either their condition worsened due to hemorrhages or they died. On the basis of these results, it is suggested that AVM should be extirpated totally. Our surgical procedure consisted of temporary occlusion of feeders using cerebral protective substances, so called “Sendai Cocktail” (mannitol, Vitamin E, steroid). This procedure makes complete surgery safe. Surgical results of the cases which were totally extirpated were better than those reported in previous reports: the mortality rate was 3,6%, and the morbidity rate was 5,4%. Because of this, surgical treatment was preferred, that is when the location, size of AVM, age, patient's circumstances and the surgeon's experience allow. However, there are still cases which must be treated with other therapy. These patients are withheld surgery because they have inaccessible AVM or large AVM etc., whose operation would cause neurological deficits. For the treatment of these cases we have recently attempt the chemical embolization method with conjugated estrogen. This produced good outcomes. These non-surgical treatments such as embolization and irradiation have still some unsolved problems and progress in the future is anticipated.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Child's nervous system 13 (1997), S. 178-181 
    ISSN: 1433-0350
    Keywords: Key words Embryonal carcinoma ; Immature teratoma ; Brain neoplasm ; Mixed germ cell tumor ; Multiplicity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A case of sequential occurrence of multiple intracranial mixed germ cell tumors is presented. An 8-year-old boy with a cystic calcified tumor in the basal ganglia and an increased serum α-fetoprotein concentration was initially treated with radiotherapy. Six years later, a tumor composed of embryonal carcinoma and immature teratoma arose from the right temporo-parietal lobe. This tumor was treated successfully with surgery and radiochemotherapy. The possibility of multicentricity or intra-axial metastasis distant from the original site during the long-term course should be considered in treatment for intracranial germ cell tumors.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neuro-oncology 15 (1993), S. 157-163 
    ISSN: 1573-7373
    Keywords: neonatal brain tumors ; medulloblastoma ; radiation ; surgery ; chemotherapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A 9-day-old female presented with a large infra- and supratentorial medulloblastoma was treated by surgery, irradiation and chemotherapy. The infant suffered from vomit a few days after birth. She was hospitalized shortly thereafter, when head enlargement was noted. A CT scan taken on admission disclosed a large mass lesion in the cerebellum, extending to the pineal portion, and marked hydrocephalus. At the age of 14 days, the patient underwent ventriculoperitoneal shunting. When she was 67 days old, the tumor was radically resected. The histopathological diagnosis was medulloblastoma. Post operatively, she was irradiated with 30 Gy to the whole brain and 20 Gy to the tumor site. As chemotherapy, ACNU, 1-(4-amino-2-methyl-5-pyrimidinyl-3-(2-chloroethyl)-3-nitrosourea 1mg/kg was administered twice per 6 weeks. On discharge at 7 months, her only neurological deficit was nystagmus. One week later, she could not move her legs and was readmitted. A CT scan showed no intracranial changes, but the spinal cord was swollen at Th12-L5 level. Myelography demonstrated a filling defect at the L3-5 level. Following irradiation of the spinal cord, the paraparesis gradually improved. However, her general status was deteriorating and a follow up CT scan revealed recurrence of the intracranial tumor. The patient died at the age of 9.3 months which is longer survival time than previous reported one. Neonatal brain tumors are rare, and there have been only 24 cases of neonatal medulloblastoma. The prognosis for these patients is extremely poor, regardless of treatment. Surgery, radiation and chemotherapy for neonatal medulloblastoma are discussed.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1573-7373
    Keywords: malignant glioma ; chemotherapy ; anthracyclines ; KRN8602 (MX2) ; phase II study
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract KRN8602 (MX2) is a newly developed morpholino anthracycline that crosses the blood–brain barrier where it becomes distributed in brain tissue after intravenous administration. This morpholino anthracycline has been found to be effective against human glioma cells and the intracerebrally transplanted tumors in vivo. We performed a phase II trial using KRN8602 as a single agent in malignant glioma patients who had not received prior adjuvant therapy. The 13 patients (5 glioblastomas, 7 anaplastic astrocytomas and 1 malignant oligodendroglioma) enrolled received at least 1 cycle of KRN8602 at 35 mg/m2/day in 3–4 week intervals by intravenous bolus. Ten of these patients could be evaluated for response, and 13 for toxicity. Three patients (1 glioblastoma and 2 anaplastic astrocytomas) demonstrated a complete response (3/10, 30%). Concerning side effects, myelosuppression was moderately severe, with 30.7% of patients developing grade 3 leukopenia. Severe nausea/vomiting was observed in 69% of the patients, however, cardiotoxicity was not observed. The results indicate that KRN8602 demonstrated modest activity against malignant glioma with relatively severe, but manageable toxicity. Further assessment of the efficacy and toxicity of KRN86O2 against malignant glioma may be worthwhile.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1861-387X
    Keywords: Apoptosis ; Glioma ; Apop Tag ; Fas ; LeY
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We examined 36 gliomas both by the terminal deoxynucleotidyl transferase-mediated dUTP-digoxigenin nick-end-labeling (TUNEL) technique and by immunostaining of antibodies against apoptosis-related antigens. The apoptotic index (AI) obtained by the TUNEL method was 10.77±3.78% in astrocytomas, 6.19±1.81% in anaplastic astrocytomas, and 5.21±1.14% in glioblastomas. The AI of anti-Fas antibody and LeY antibody in gliomas also showed a similar tendency as the results with the TUNEL method. As a result, statistically significant differences were observed in the distribution of survival between the two groups according to the AI obtained by the TUNEL method. Therefore, an analysis of the AI is considered to be useful for prognosis.
    Type of Medium: Electronic Resource
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