Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0020538 (hypertension)
 170,190 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Bilateral optic atrophy developed in a 15-year-old patient receiving concomitant neuraxis radiation therapy and weekly vincristine sulfate for medulloblastoma. Other neurologic manifestations that have been associated with vincristine therapy, including inappropriate secretion of antidiuretic hormone, hypertension, confusion, and a severe peripheral neuropathy, were also observed. Neither increased intracranial pressure nor active tumor was identified. Recovery of visual function followed discontinuation of vincristine. Other neurotoxicities also reversed with drug withdrawal. Visual loss occurring in a patient receiving vincristine should alert the physician to the possibility that the process is drug related. This complication may be more likely in patients receiving concomitant or previous cranial radiation therapy. Other central neurotoxicities of vincristine may also be accentuated by neuraxis radiation. It is recommended that vincristine be discontinued in this situation if an aggressive search for a structural anatomic lesion in the optic mechanism is unrevealing, as the prognosis for recovery of visual function appears excellent.
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PMID:Optic atrophy induced by vincristine. 709 98

Among 140 cases of chronic extracerebral fluid collections treated surgically, 7 cases (5%) of intracerebral hematoma occurring immediately after drainage were encountered. In none of the patients was a preoperative intracerebral clot or contusion identified by either computed tomographic scan or angiography. One patient had pre-existing systemic hypertension. Five of the patients had chronic subdural hematomas, 1 had a subdural hygroma and had been previously radiated for medulloblastoma, and 1 patient had a middle fossa arachnoid cyst. Four of the group had had craniotomies and three had undergone trephination for the primary lesion. The postoperative intracerebral hematomas were manifest by rapid deterioration of consciousness and focal neurological findings occurring usually immediately (but, in 2 cases, a few days after) the original procedure. Five patients underwent secondary craniotomy and 2 had external drainage. Despite rapid treatment, 2 of the patients died, 4 were left with severe disability, and only 1 survived intact. None of the patients had identifiable coagulopathy, and only 1 patient was hypertensive in the immediate postoperative period. The factors that all of the patients had in common were preoperative increased intracranial pressure and shift of the midline structures, as well as rapid surgical decompression of the initial lesion. Possible pathogenic mechanisms include hemorrhage into previously undetected areas of contusion, a sudden increase in cerebral blood flow combined with faulty autoregulation, and damage to parenchymal vessels secondary to rapid intra- or postoperative shift of the intracranial contents. Perhaps this devastating complication can be avoided if closed system drainage is used for the treatment of chronic surface collections.
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PMID:Intracerebral hematoma after evacuation of chronic extracerebral fluid collections. 711 May 41

Malignant brain tumours (mainly medulloblastoma, glioma, and ependymoma) are the first cause of solid tumours in children, and a major cause of mortality from cancer in paediatrics. The most frequent circumstance of discovery is intracranial hypertension. Early and atypical signs should give the alarm and call for emergency neuroradiological explorations. Major therapeutic advances have been made in the last ten years in the fields of neurosurgery, radiotherapy and chemotherapy of brain tumours in children. Multidisciplinary care is now indispensable usually as part of multicentre cooperative clinical trials. Therapeutic approaches are guided by a concern not only for effectiveness, but also for low toxicity, in order to reduce the long-term sequelae often caused by irradiation of the developing central nervous system.
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PMID:[Malignant cerebral tumors in children]. 814 34

In the last thirty years much progress has been made in the treatment of brain tumors in children, thanks to modern diagnostic imaging techniques, together with neurosurgery and radiotherapy, for the diagnosis and follow-up of these lesions. MRI and paramagnetic contrast agents have revolutionized the imaging of intracranial conditions, especially in the posterior cranial fossa. The superiority of MRI over CT is well known and reported in the literature, but the adequacy of the two methods has rarely been compared. Therefore, this study was aimed at assessing and quantitating the accuracy of MRI and CT relative to two essential parameters: preoperative "histologic" diagnosis and local and distant intracranial tumor extent. In 52 selected patients the final histologic diagnosis was cerebellar medulloblastoma in 20 cases, cerebellar astrocytoma in 12 cases, brain stem glioma in 12 cases and ependymoma in 8 cases. CT allowed the correct diagnosis to be made in 25 patients (48%), with questionable findings in 21 patients (40%) and 6 misdiagnoses (12%). MRI allowed the correct diagnosis to be made in 43 patients (83%), with questionable findings in 9 patients (17%) and no misdiagnoses. MRI depicted local and distant tumor spread in 34 patients while CT showed it in 22 patients only. The analysis of the results confirmed the superiority of MRI over CT, relative to the parameters considered, i.e. histology and the assessment of tumor spread. In the clinical suspicion of brain tumors of the posterior cranial fossa in children, MRI--if available--should be the examination of choice if the patient's clinical status does not prevent its use. CT should be used only in emergency cases (acute intracranial hypertension) to identify hydrocephalus and intratumoral hemorrhages. Unenhanced CT also yields useful pieces of information for lesion "histology" and may be used to integrate MR findings in selected cases.
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PMID:[Magnetic resonance and computerized tomography of posterior cranial fossa tumors in childhood. Differential diagnosis and assessment of lesion extent]. 855 14

The majority of intracranial teratoma are localized in pineal and sellar regions. In cerebellum, the teratoma is quite rare, the association with medulloblastoma is exceptional and was differentiated from medullomyoblastoma. We report one case of 5 years old boy with intracranial hypertension for 3 months. The cerebral computed tomography showed a tumor in the fourth ventricle. The histologic study of surgical specimens found a proliferation of component of medulloblastoma adjacent to mature teratoma with smooth and striated muscles, chondroid component, adipose tissue and epithelial elements. Our objective is to discuss the diagnosis, the hitogenesis and the prognosis of this tumor.
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PMID:[Teratoma and medulloblastoma of the cerebellum: a case]. 1059 77

The clinical, histopathological, and ultrastructural features of a cerebellar liponeurocytoma are reported. The tumor, a 3-cm mass localized in the right cerebellar hemisphere, was resected from a 61-year-old man clinically presenting with symptoms of intracranial hypertension. The lesion was composed of small, in some areas closely packed, medulloblastoma-like cells with prominent areas of lipidization phenomena. Moreover, mitoses, cellular atypia, and numerous vascular structures were focally observed. Glial and neuronal differentiation was immunohistochemically noted (glial fibrillary acidic protein, synaptophysin, neurofilaments, and neuron-specific enolase positivity). The p53 oncoprotein was detected in the majority of neoplastic cells and a moderate proliferation activity, evaluated by Mib-1 antibody, was focally appreciated. Ultrastructural study did not show evident neuritic processes, synapses, or dense core neuroendocrine granules. This cerebellar tumor previously called lipidized medulloblastoma and recently renamed cerebellar liponeurocytoma is considered an adult neoplasm with excellent prognosis histologically presenting prominent lipidized areas and, at the immunohistochemical and ultrastructural level, both glial and neuronal differentiation. The present study provides the first description of a less differentiated and histologically more aggressive form of this unusual tumor.
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PMID:Cerebellar liponeurocytoma: immunohistochemical and ultrastructural study of a case. 1129 21

Intravascular lymphomatosis (IL) is a rare entity only recently included in lymphoma classification, whose main feature is the exclusive or predominant growth of neoplastic cells within blood vessels. The vast majority of the patients affected by IL belong to the 7th or 8th decade of life and present with skin rash or CNS diffuse necrotic or demyelinating lesions. Case report. SS, a 13-year-old girl, was admitted to a Neurosurgery Unit because of endocranic hypertension, where, after CT and MRI documenting a IV ventricle 3 cm diameter tumor, she was submitted to complete tumor excision: extemporary diagnosis was suggestive of medulloblastoma. When referred to us she had persistent fever with normal blood and spinal fluid cultures. Whole CNS MRI did not give evidence of residual or metastatic disease while CSF cytology showed only pleiocytosis. Treatment was started according to our ongoing protocol for medulloblastoma with pre-radiation chemotherapy. Before delivering radiotherapy (RT), upon review of histologic specimens, the definitive diagnosis of IL B-phenotype was made. The girl was re-admitted and, after a complete re-staging, chemotherapy was intensified according to our schedule for high-grade B-cell lymphoma and CNS was irradiated up to a total dose of 25 Gy. She remained alive in continuous complete remission at 21 months after diagnosis. The case here reported is unique for age, tumor presentation, and, so far, favourable outcome, in spite of the delayed histological diagnosis.
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PMID:Intravascular lymphomatosis (IL) in a child mimicking a posterior fossa tumor. 1134 80

Cerebellar liponeurocytoma has recently been recognised by the 2000 World Health Organisation classification of tumours of the central nervous system as a distinct clinicopathologic entity. To our knowledge, 18 cases have been reported so far, under different names, such as "lipomatous medulloblastoma, lipidized medulloblastoma, neurolipocytoma, medullocytoma and lipomatous glioneurocytoma". The new classification included cerebellar liponeurocytoma in the category of glioneuronal tumours grade I or II because of its favourable clinical behaviour. The origin and nature of the lipomatous component have been matter of debate and make this tumour entity puzzling. We describe a new case of liponeurocytoma removed from the left cerebellar hemisphere of a 38-year-old-woman. The patient showed unspecific signs of intracranial hypertension and symptoms suggesting a posterior fossa lesion.
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PMID:Cerebellar liponeurocytoma: a case report and review of the literature. 1508 May 26

Medulloblastoma is one of the most common malignant childhood brain tumors. It is a primitive neuroectodermal tumor (PNET) and predominantly arises in the cerebellum and 4th ventricle. Most cases of medulloblastoma are sporadic, but some predisposition syndromes are known, such as SUFU and Gorlin syndromes. Most often intracranial hypertension reveals the disease typically with headache and vomiting. However, the frequent atypical presentation should not delay neuroradiological investigations. Brain and spinal MRI can establish the diagnosis of posterior fossa tumor and define the extent of the disease. CSF study completes the staging. Histologic examination of the tumor confirms the diagnosis of medulloblastoma. Patients are classified into 2 risk groups: standard-risk medulloblastoma, defined by nonmetastatic disease treated by total or subtotal tumor resection; and high-risk patients who have disseminated disease and/or residual disease. Tumor molecular genetic findings allow the use of emerging prognostic factors and may ultimately contribute to the development of targeted therapy. Current treatment in the oldest children combines surgical resection followed by radiotherapy and chemotherapy. The aim of recent studies was to increase survival and decrease sequelae by reducing CSI in older children with standard risk medulloblastoma. Treatment in younger patients is as much as possible restricted to surgery and chemotherapy. However, long-term sequelae after treatment for medulloblastoma remain frequent and the detection and treatment of those sequelae is an essential part of the follow-up of the patients.
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PMID:[Childhood medulloblastoma]. 1899 98

The authors present a case report of a pediatric patient with recurrent metastatic medulloblastoma who demonstrated significant clinical improvement after placement of a palliative ventriculoperitoneal (VP) shunt. They also review the medical literature that supports palliative surgical management of hydrocephalus and intracranial hypertension (ICH) caused by leptomeningeal (LM) spread of malignancy. The burdens and benefits of an invasive surgical procedure must always be weighed carefully, especially at end-of-life. Yet for some patients with LM spread and ICH, VP shunting may improve their quality of life, although their prognosis remains poor.
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PMID:Palliative ventriculoperitoneal shunt in a pediatric patient with recurrent metastatic medulloblastoma. 1932 82


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