1/276. aneurysm occurring within a meningioma: case report.Aneurysms can be expected to be found in approximately 0.5% of patients with brain tumours; nevertheless, the real incidence is difficult to assess because angiography is now seldom performed for brain tumours. In the literature, 42 cases of meningioma associated with aneurysms are reported, but in none was the aneurysm intratumoural. We describe a case of intracranial meningioma with an intratumoural aneurysm in a 48-year-old woman.- - - - - - - - - - ranking = 1keywords = tumour (Clic here for more details about this article) |
2/276. meningioma followed up for radiological findings before and after radiosurgery: case report.The present paper reports on serial image changes before and after radiosurgery regarding a falx meningioma incidentally discovered in a 79-year-old female. The tumor doubling time during the 3-year observation period before radiosurgery was 469 days. Following radiosurgery using a gamma knife, tumour volume temporarily increased, but then reduced to 55% in 22 months. No symptoms or signs are observable at present, when the patient is 84 years old. These findings suggest that in treating elderly patients with meningioma diagnosed by imaging, radiosurgery should be the first method considered. Also presented are changes in image findings over time.- - - - - - - - - - ranking = 0.25keywords = tumour (Clic here for more details about this article) |
3/276. Biologic heterogeneity of angiomatous meningiomas.Three angiomatous meningiomas, classified histologically as benign, were analyzed cytogenetically and examined for the expression of EGF/PDGF and their receptors by immunohistochemistry. An accumulation of p53 protein and the presence of mutations in exons 5-8 of the p53 gene in neoplastic cells were also determined. In one tumour, chromosome studies revealed near diploid karyotype with the loss of chromosome 22. Two other meningiomas revealed tetraploid karyotypes with the presence of telomeric associations and a wide spectrum of numerical, complex chromosome aberrations. Moderate EGF and EGFR immunoreactivity was found in three and one meningioma, respectively. All tumours exhibited diffuse PDGF and PDGFR-beta expression. No p53 gene mutations were found, but one tumour expressed strong and dispersed p53 immunopositivity. This findings reflect the biological heterogeneity of angiomatous meningiomas.- - - - - - - - - - ranking = 0.75keywords = tumour (Clic here for more details about this article) |
4/276. thallium-201 SPECT of adjacent intracranial tumours: a contrast in thallium kinetics.We report a case of adjacent intracranial tumours: malignant fibrous histiocytoma (MFH) and meningioma. thallium-201 single-photon emission computed tomography demonstrated different thallium kinetics between the tumours (slow washout from the MFH and rapid clearance in the meningioma) and could be said to have been useful for preoperative histological estimation.- - - - - - - - - - ranking = 1.5keywords = tumour (Clic here for more details about this article) |
5/276. Meningeal leiomyoma in an adult with AIDS: CT and MRI with pathological correlation.We describe the imaging features of a meningeal leiomyoma with pathological correlation in an adult with AIDS. On CT the tumour showed a central low-attenuation area and an enhancing peripheral ring. It gave low signal on T1 weighting and on T2-weighted images a central high-signal area was surrounded by a markedly low-signal band, which showed contrast enhancement. As far as we know, this is the first report of this condition in the radiological literature.- - - - - - - - - - ranking = 0.25keywords = tumour (Clic here for more details about this article) |
6/276. Unique radiological appearance of a microcystic meningioma.A 35-year-old female presented with partial complex seizures. Computed tomography (CT) showed a slightly high density mass over the right frontal convexity, with heterogeneous contrast enhancement. T1-weighted magnetic resonance (MR) imaging showed the tumour as a hypo-intense lesion, with faint reticular enhancement after intravenous injection of gadolinium-diethylenetriaminepenta-acetic acid. The tumour was totally removed. The specimen was extremely soft and moist. The histological diagnosis was microcystic meningioma. The tumour cells were composed of typical meningothelial cells and stellate cells. The degenerative character of the tumour may be reflected in the poor enhancement on CT and MR imaging. This faint enhancement effect may be a neuro-imaging characteristic indication of this rare microcystic variant of meningioma.- - - - - - - - - - ranking = 1keywords = tumour (Clic here for more details about this article) |
7/276. Posterior fossa surgery in the sitting position in a pregnant patient with cerebellopontine angle meningioma.Primary brain tumours and pregnancy rarely occur together; meningioma and pregnancy is rarer still. We describe a 30-yr-old woman in the 25th week of pregnancy who underwent surgery in the sitting position for a large cerebellopontine angle meningioma that was compressing and displacing the pons and medulla. The surgical procedure and postoperative period were uneventful. This case demonstrates that when absolutely necessary, anaesthesia and neurosurgery for posterior fossa lesions can be successful during the second trimester of pregnancy. Furthermore, if indicated and if the operating team is experienced, the operation can be performed safely with the patient in the classical sitting position. It is emphasized that continuous and attentive monitoring of the mother and fetus are essential.- - - - - - - - - - ranking = 0.25keywords = tumour (Clic here for more details about this article) |
8/276. Utility of a moveable 1.5 Tesla intraoperative MR imaging system.OBJECTIVE: This study demonstrates the utility of a newly-developed moveable 1.5 Tesla intraoperative MR imaging system using a case report of a multi-lobulated parafalx meningioma. CLINICAL PRESENTATION: A 43-year-old female presented with progression of a multi-lobulated anterior parafalx meningioma several years following resection of a large left frontal convexity meningioma. INTERVENTION AND TECHNIQUE: Surgical excision of the lesion was undertaken. Following apparent total resection, intraoperative MR imaging revealed two residual dumbell shaped lobules. Using these updated MR images, the tumour was readily identified and removed. CONCLUSION: The moveable 1.5 Tesla intraoperative MR system used in the present case provides rapid, high resolution MR images during neurosurgical procedures. Moving the magnet out of the surgical field during surgery permits the use of all standard neurosurgical instruments. The ease of use and quality of images combined with minimal interference on well-established surgical techniques makes this system a valuable adjunct in the neurosurgical treatment of intracranial disease.- - - - - - - - - - ranking = 0.25keywords = tumour (Clic here for more details about this article) |
9/276. Distant metastasis of liposarcoma to the dura and skull: a case report.A case of metastatic liposarcoma of both skull and brain originating from the lower extremity is described. A 44-year-old male underwent removal of a myxoid type liposarcoma in his left upper thigh and a second operation for local recurrence. A metastatic liposarcoma was also discovered in the mediastinum and treated by radiotherapy. Six years after the initial onset, he presented with progressive consciousness disturbance, motor aphasia, right hemiparesis and subcutaneous swelling in the left frontal region. neuroimaging showed a large tumour extending both intracranially and extracranially across the eroded skull. The intracranial portion of the tumour had invaded the frontal lobe. The tumour was subtotally removed. The operative findings suggested that the tumour had metastasized to the dura mater or the skull initially, and invaded the surrounding tissues. The histological appearance was the same as those of the previous tumours.- - - - - - - - - - ranking = 1.25keywords = tumour (Clic here for more details about this article) |
10/276. Extradural meningioma in the left fronto-temporo-parietal region.A case of a 47-year-old male patient who presented with a history of complaints of headache, vertigo and an expanding painful swelling on the left side of the head over the last year is reported. The lump was 15 x 15 cm and protruded 1-3 centimeters. Neurological examination revealed the presence of a mild right hemiparesis with right central facial palsy. Plain skull x-ray film demonstrates a heterogeneous bone thickening in the left fronto-temporo-parietal region with a small osteolytic focus and spotted shadows. Computed tomography scan of the skull showed that a major part of the squamas of the frontal and temporal bones were transformed into spiculoform structures turned outwards and inwards. Thus the bone appeared thickened overall. There were no alterations in the cerebral structures. The tumour was completely removed. It was located extradurally and through the bones extended to the soft tissues under the skin. The histological findings showed a meningioma with hemorrhages and necroses and the presence of lipids containing xanthochromic cells. After a surgical extirpation of the tumour a reduction of the neurological symptomatology and subjective complaints was observed.- - - - - - - - - - ranking = 0.5keywords = tumour (Clic here for more details about this article) |
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