Search Results

You are looking at 1 - 10 of 7,236 items for :

  • "appearance" x
Clear All
Restricted access

Timothy B. Mapstone, Benjamin Kaufman and Robert A. Ratcheson

C hordomas are uncommon tumors of the central nervous system thought to arise from remnants of the notochord. Approximately 30% to 40% of these lesions arise in the region of the clivus and are at least in part extradural. 2–4, 10 The roentgenological appearance of dense retrosellar calcification and bone destruction has been stated to be pathognomonic of this tumor. 5, 7, 8 We describe a case of chordoma arising near the clivus in which no bone destruction was evident on plain radiographs, polytomograms, or computerized tomography (CT) scanning. At

Restricted access

Eli Reichenthal, Mathias L. Cohen, Elias Schujman, Nachman Eynan and Mordechai Shalit

pyogenic brain abscess generally shows a thin rim of higher than normal brain density surrounding a central area of low density. 4 Apart from the single case reported by Leblanc, 3 we have, to date, been unable to find any other published account of the CT appearance of a tuberculous brain abscess. The CT appearances of both Leblanc's case and ours are noteworthy for the thickness of the hyperdense rim corresponding to the abscess capsule. While it would be unwise to generalize from the findings in only two such cases, in view of the acknowledged rarity of tuberculous

Restricted access

Daniele Rigamonti, Robert F. Spetzler, Burton P. Drayer, W. Michel Bojanowski, John Hodak, K. Hoenig Rigamonti, K. Plenge, M. Powers and Harold Rekate

examination; VM = venous malformation; C− = without iodinated contrast medium; C+ = with iodinated contrast medium; ↓ SI = decreased signal intensity; ↑ SI = increased signal intensity. Results The clinical and neuroradiological findings for each patient are summarized in Table 1 . In every case, angiography showed a normal arterial and capillary phase and a typical caput medusae appearance with prominent medullary venules in the venous phase ( Fig. 1 ). Multiple venous malformations were found in two (18%) of 11 cases. In nine patients undergoing CT

Restricted access

Kazunori Hayashi, Louis Boissière, Fernando Guevara-Villazón, Daniel Larrieu, Susana Núñez-Pereira, Anouar Bourghli, Olivier Gille, Jean-Marc Vital, Ferran Pellisé, Francisco Javier Sánchez Pérez-Grueso, Frank Kleinstück, Emre Acaroğlu, Ahmet Alanay and Ibrahim Obeid

recorded. Data on surgery-related and potentially relevant complications and any reasons for revision surgery until 2 years after surgery were collected on the basis of the previous literature. 14 The SRS-22R, Oswestry Disability Index (ODI), SF-36 items, and numeric rating scale (NRS) were used to evaluate HRQOL at baseline and 2 years after surgery. 2 , 6 , 10 , 22 The SRS-22R is divided into 5 subdomains accounting for function/activity, pain, self-image (SI)/appearance, mental health, and satisfaction with management; each domain is rated from 1 to 5. The ODI

Restricted access

Luis F. Pagani

P apilledema is generally considered to be slow in developing and is not common early in the evolution of a neurological disorder or increased intracranial pressure. On occasion, however, it is possible in previously well patients to follow the development of papilledema within hours after an intracranial hemorrhage. The shortest time recorded between the onset of intracranial hemorrhage and the appearance of papilledema has been 12 hours. 1 Recently we have observed three patients in whom papilledema developed 2 to 4 hours after the ictus. Case Reports

Restricted access

Junichi Mizuno, Hiroshi Nakagawa, Tatsushi Inoue and Yoshio Hashizume

B ecause of the efficiency of high-resolution MR imaging, greater attention has been paid to the intramedullary pathological entities as well as extramedullary abnormalities or deformities of the spinal cord. Snake-eye appearance is a unique neuroimaging finding characterized as nearly symmetrical round high signal intensity of the spinal parenchyma resembling the face of a snake demonstrated on axial T 2 -weighted MR images. 1, 3, 11, 20, 22 Although this appearance is not uncommon in compressive myelopathic conditions such as cervical spondylosis or OPLL

Restricted access

William A. Fletcher, Richard K. Imes and William F. Hoyt

C omputerized tomography (CT) is an indispensable tool for the detection, definition, and follow-up evaluation of chiasmal gliomas. The evolution of CT scanners during the past decade has provided progressively more reliable and informative images of these tumors. We have reviewed our experience with CT evaluations of 22 chiasmal gliomas in order to: 1) document variations in the tumors' shape and appearance; 2) determine whether correlations exist between CT appearance and neurofibromatosis or histopathology; 3) document tumor growth or lack of growth, and

Restricted access

Johannes K. Lang and Herbert Kolenda

I n contemporary anatomical nomenclature terms have often been derived from an ancient view of the human body. Based on an understanding of the interaction between religion and daily life in ancient Egypt, we document the first known appearance, and subsequent development, of the term “spinal column.” The Djet Column Origin and Ancient Meaning In predynastic times (3500–3000 BC) the djet was a divine symbol. 1, 20 Its exact meaning in those times remains a matter of debate. Nevertheless, since the Old Kingdom period (2650–2150 BC), the djet had been

Restricted access

William B. Seaman, Sumner N. Marder and Herbert E. Rosenbaum

A review of the literature reveals a paucity of illustrations of the myelographic appearance of spinal adhesive arachnoiditis. 1, 3, 5, 6, 11, 12 Most of those published are of the extensive variety that cause little diagnostic difficulty. In view of the recent report of Kennedy el al. 8 emphasizing the frequency of adhesive arachnoiditis following spinal anesthesia, it was felt that publication of the following 7 surgically verified cases would be of interest. The clinical features and therapeutic aspects have been recently reviewed by one of us, 10 and

Restricted access

Daniele Rigamonti, Burton P. Drayer, Peter C. Johnson, Mark N. Hadley, Joseph Zabramski and Robert F. Spetzler

as a central core of mixed increased and decreased signal intensity (SI) surrounded by a dense black rim of decreased SI due to hemosiderin-laden macrophages. The arrows point to a smaller lesion characterized by a core of predominantly decreased SI (“black dots”). Magnetic Resonance Imaging In every case MRI demonstrated the lesion(s), with a total of 27 separate lesions seen on the T 2 -weighted images. Eighteen larger lesions appeared on T 2 -weighted images as areas of mixed signal intensity (SI) with a “reticulated” appearance and a prominent