Neuroradiology 0028-3940

Asari, S.; Katayama, S.; Itoh, T.; Tsuchida, S.; Ohmoto, T.

doi: 10.1007/BF00602603pmid: 8492884

234 35 35 4 4 S. Asari S. Katayama T. Itoh S. Tsuchida T. Ohmoto Department of Neurological Surgery Okayama University Medical School 2-5-1 Shikata-cho 700 Okayama-City Japan Abstract Six patients with haemorrhage into intracranial neuromas were studied by computed tomography (CT) and magnetic resonance imaging (MRI) at 0.5 T with spinecho pulse sequences. The nature of the tumour and the presence of a haematoma were confirmed by surgery and microscopic examination in all cases. Four neuromas arose from the acoustic nerves and two from the trigeminal. Four of the six patients suffered from sudden onset or rapid worsening of symptoms including headache, vertigo and/or hemifacial motor and sensory disturbances. CT in the acute stage revealed a hyperdense area or a fluid-fluid level (FFL). The hyperdense area disappeared on CT repeated in the chronic stage. On MRI in subacute and chronic stages the haemorrhage showed hyperintensity on both T1 and T2 weighting in five cases examined between 16 and 46 days after the onset, and isointensity on T1 weighting and an FFL on T2 weighting in one case examined 12 days after the onset of symptoms. A well-defined low intensity rim indicating prior haemorrhage was observed on T2-weighted images in three cases. MRI was more effective than CT in detecting haemorrhage into the tumours and in staging it.

Golzarian, J.; Balériaux, D.; Bank, W.; Matos, C.; Flament-Durand, J.

doi: 10.1007/BF00602604pmid: 8492885

234 35 35 4 4 J. Golzarian D. Balériaux W. O. Bank C. Matos J. Flament-Durand Department of Neuroradiology Hôpital Universitaire Erasme, Université Libre de Bruxelles 808 Route de Lennik B-1070 Brussels Belgium Department of Neuropathology Hôpital Universitaire Erasme, Université Libre de Bruxelles Brussels Belgium Department of Interventional and Therapeutic Neuroradiology The George Washington University Medical Center Washington, D.C. USA Abstract Review of 500 consecutive MRI studies was undertaken to assess the frequency and the appearances of cystic pineal glands. Cysts were encountered in 2.4% of cases. Follow-up examination demonstrated no change in these cysts and they were considered to be a normal variant. Size, MRI appearances and signs associated with this condition are reported in order to establish criteria of normality.

Kadota, Y.; Ito, M.; Wachi, A.; Sato, K.

doi: 10.1007/BF00602605pmid: 8492886

234 35 35 4 4 Y. Kadota M. Ito A. Wachi K. Sato Department of Neurosurgery Juntendo University, School of Medicine 2-1-1 Hongo, Bunkyo-ku 113 Tokyo Japan Abstract We describe a case in which CT and MRI showed evidence of intraventricular fat, which proved to have come from a ruptured malignant teratoma.

Markus, H.; Kendall, B.

doi: 10.1007/BF00602606pmid: 8492887

234 35 35 4 4 H. Markus B. E. Kendall Department of Neurology Middlesex Hospital London Department of Radiology Middlesex Hospital London Lysholm Department of Radiology National Hospital for Neurology and Neurosurgery Queen Square WC1N 3BG London UK Abstract A fourth ventricular dermoid cyst examined by CT, MRI and angiography is reported. The combination of CT density and MRI signal indicated the presence of hair within the cyst, which was confirmed at surgery.

Whyte, A.; Sage, M.; Brophy, B.

doi: 10.1007/BF00602607pmid: 8492888

234 35 35 4 4 A. M. Whyte M. R. Sage B. P. Brophy Department of Radiology Flinders Medical Centre 5402 Bedford Park S. A. Australia Department of Neurosurgery Flinders Medical Centre 5402 Bedford Park S. A. Australia Abstract Two patients with large Rathke's cleft cysts in the sella turcica and suprasellar region presented with visual impairment and hypopituitarism. The entirely different CT and MRI appearances of the two cysts were thought to depend principally on the protein content of the cyst fluid.

Demaerel, P.; Moseley, I.; Scaravilli, F.

doi: 10.1007/BF00602608pmid: 8492889

234 35 35 4 4 P. Demaerel I. F. Moseley F. Scaravilli Department of Neuropathology National Hospital for Neurology and Neurosurgery London UK Lysholm Radiological Department National Hospital for Neurology and Neurosurgery Queen Square WC1N 3BG London UK Abstract A case is described in which a recurrent craniopharyngioma extended into the sphenoid bone, posterior ethmoid cells, cavernous sinus and orbit.

Hawkins, C.; McLaughlin, J.; Kendall, B.; McDonald, W.

doi: 10.1007/BF00602609pmid: 8388082

234 35 35 4 4 C. P. Hawkins J. E. McLaughlin B. E. Kendall W. I. McDonald NMR Research Group Institute of Neurology Queen Square WC1N 3BG London UK Department of Histopathology Royal Free Medical School Rowland Hill St NW3 London UK Abstract MRI forms an important part of the assessment of patients with HIV-related disease presenting with cerebral smyptoms. Eleven formalin-fixed brains were studied at 0.5 T using T2- and T1-weighted sequences. In two cases of progressive multifocal leucoencephalopathy and one case each of toxoplasmosis and lymphoma, the extent of white matter abnormality seen on MRI corresponded broadly with that on pathological examination. In general, however, histological changes were more frequent than lesions on MRI. Cases in which abnormalities were not seen with standard MRI included those with multiple tuberculous granulomata, multinucleate giant cells, microglial nodules, perivascular cuffing and cytomegalovirus inclusions. A common finding on MRI was punctate or patchy high signal in the basal ganglia on T2-weighted scans, seen in six cases. Corresponding histological changes included calcification of vessels with widened perivascular spaces, and mineralised neurones.

Li, J.; Xiong, L.; Jinkins, J.

doi: 10.1007/BF00602610pmid: 8492890

Lunardi, P.; Mastronardi, L.; Nardacci, B.; Acqui, M.; Fortuna, A.

doi: 10.1007/BF00602611pmid: 8492891

234 35 35 4 4 P. Lunardi L. Mastronardi B. Nardacci M. Acqui A. Fortuna Department of Neurological Sciences-Neurosurgery University of Rome “La Sapienza” Rome Italy Clinica Neurochirurgica Viale dell' Università 30/A I-00185 Rome Italy Abstract A “dural tail” on Gd-DTPA-enhanced MRI has been often observed adjacent to meningiomas and considered to be useful in distinguishing meningioma of the cerebellopontine angle from acoustic neuroma. However, demonstration of a dural tail adjacent to an acoustic neuroma indicates that this sign is not specific.

Toye, R.; Jeffree, M.

doi: 10.1007/BF00602612pmid: 8492892