| 1. |
- Sjöholm, H, et al.
(författare)
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Necrosis of malignant gliomas after intratumoral injection of 201Tl in vivo in the rat
- 1995
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Ingår i: Anti-Cancer Drugs. - 0959-4973. ; 6:1, s. 109-114
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Tidskriftsartikel (refereegranskat)abstract
- Fourteen adult Fischer 344 rats were inoculated in vivo unilaterally in the caudate nucleus in the brain with malignant RG 2 glioma cells. By 3 weeks a tumor with a diameter of 3-6 mm normally develops. Ten animals which survived the repeated periods of anesthesia and thallium (Tl) injections (intratumorally three times of 201Tl, 15-23 days after inoculation) showed a prolonged retention of radioactivity at the site of injection with no uptake in other organs except for the kidneys. Singular circumscribed necroses were found post-mortem at the site of injection, comprising malignant glioma tumor tissue, which in six animals was absent, in three animals was markedly reduced in size compared with controls and in one animal had the expected size. In four animals metastases were found in distant locations in the brain; in three of these cases there was a retention of radioactivity in the tumor. The selective necrotizing effect on the tumor cells is interpreted as mainly due to emission of Auger electrons from intracellularly accumulated 201Tl, giving rise to very high energy deposition in the vicinity of the cell nucleus. The results should also have implications for the treatment of human malignant gliomas.
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| 2. |
- Brandt, Lennart, et al.
(författare)
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Myelography in the late postoperative period in patients subjected to anterior cervical decompression and fusion
- 1993
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Ingår i: Acta Neurochirurgica. - 0001-6268. ; 122:1-2, s. 97-101
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Tidskriftsartikel (refereegranskat)abstract
- During a 13 year period, 286 patients with cervical disc herniation and/or spondylotic spurs, were subjected to anterior decompression and vertebral interbody fusion with autologous bone. Twenty patients were re-admitted in the late postoperative period due to recurrent radicular symptoms and/or signs of myelopathy. In these patients myelography was performed again. In 14 patients spinal cord compression and/or nerve root involvement at a new level was visualized. At the operated level, however, the myelograms demonstrated a smooth anterior wall in the spinal canal. The series confirms the safety, effectiveness and reliability of the Cloward procedure in achieving long term spinal cord and nerve root decompression, and a solid vertebral interbody fusion.
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| 3. |
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| 4. |
- Maeder, Philippe P, et al.
(författare)
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Colloid cysts of the third ventricle: correlation of MR and CT findings with histology and chemical analysis
- 1990
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Ingår i: AJNR. - 1936-959X. ; 155:1, s. 135-141
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Tidskriftsartikel (refereegranskat)abstract
- Eight patients with colloid cysts of the third ventricle were examined with CT and MR. In six, surgical resection was performed and the material was subjected to histologic evaluation; the concentrations of trace elements were determined by particle-induced X-ray emission. Stereotaxic aspiration was performed in two. The investigation showed that colloid cysts are often iso- or hypodense relative to brain on CT (5/8), but sometimes have a center of increased density. Increased density did not correlate with increased concentration of calcium or other metals but did not correlate with high cholesterol content. Colloid cysts appear more heterogeneous on MR (6/8) than on CT (3/8), despite a homogeneous appearance at histology. High signal on short TR/TE sequences is correlated with a high cholesterol content. A marked shortening of the T2 relaxation time is often noticed in the central part of the cyst. Analysis of trace elements showed that this phenomenon is not related to the presence of metals with paramagnetic effects. Our analysis of the contents of colloid cysts does not support the theory that differing metallic concentrations are responsible for differences in MR signal intensity or CT density. We did find that increased CT density and high MR signal correlated with high cholesterol content.
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| 5. |
- Sundgren, P, et al.
(författare)
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Paragangliomas of the spinal canal
- 1999
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Ingår i: Neuroradiology. - : Springer Science and Business Media LLC. - 1432-1920 .- 0028-3940. ; 41:10, s. 788-794
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Tidskriftsartikel (refereegranskat)abstract
- We report the clinical MRI and histopathological features of five consecutive cases of spinal paraganglioma. Three intradural tumours were found in the typical location (two at the L4, one at the S2 level); one intradural extramedullary tumour arose at an unusual level, from the ventral C2 root, and one extradural tumour growing along the L5 nerve root sheath had an aggressive growth pattern with early, local paraspinal recurrence and, eventually, intradural metastatic spread. This type of growth pattern has not been described previously. Paragangliomas of the spinal canal are more common than previously thought and can be located anywhere along the spine, although the lumbosacral level is the most common. Their appearance on MRI can not distinguish them from other tumours in the spinal canal. Even though paragangliomas in general are benign and slowly growing their growth pattern can vary and be more aggressive, to the point of metastatic spread.
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| 6. |
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| 7. |
- Levi, Richard, et al.
(författare)
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The Stockholm Spinal Cord Injury Study : 2. Associations between clinical patient characteristics and post-acute medical problems.
- 1995
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Ingår i: Paraplegia. - : Springer Science and Business Media LLC. - 0031-1758. ; 33:10, s. 585-594
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Tidskriftsartikel (refereegranskat)abstract
- The Stockholm Spinal Cord Injury Study (SSCIS) is an extensive evaluation of a sample of 353 subjects with traumatic SCI, constituting 93% of the known regional prevalence population with this diagnosis. In a previous analysis of this group, symptoms such as pain, incontinence, sexual dysfunction and neurological deterioration, as well as secondary complications, such as decubitus ulcers, urinary tract infections, spinal deformity and fractures, were found to be common. In the present report, we investigate associations between a few commonly used patient characteristics, ie gender, age at injury, duration of injury and extent of neurological compromise, and the occurrence of such problems, to assess differences in vulnerability in SCI subgroups. Results generally indicate an increased vulnerability in subjects with extensive neurological deficits, as well as a cumulation of complications with the increasing duration of injury. However, some exceptions are found, possibly indicating differences in temporal patterns of the occurrence of various complications, as well as certain gender-, age-, and lesion-associated variations in vulnerability. Symptoms directly related to the spinal cord lesion, eg neurogenic pain and neurological deterioration, seem to present rather soon post-injury. Males are more prone to experience excessive spasticity and sexual problems. Females experience more fractures and spinal deformity. Younger age at injury is associated with more spinal deformity but less severe pain problems. Higher age at injury is not found to be associated with more medical problems, with the exception of neurogenic pain, among post-acute, post-discharge survivors. The latter finding does not, however, preclude more such problems in the acute stage, since the present study neither addresses the pre-discharge period, nor includes information about mortality. Finally, the ASIA/IMSOP Impairment Scale Grade E-rated subjects were found to report problems to an extent that underlines the restricted sensorimotor sense in which this rating reflects recovery.
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| 8. |
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| 9. |
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| 10. |
- Brattström, L, et al.
(författare)
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Pyridoxine reduces cholesterol and low-density lipoprotein and increases antithrombin III activity in 80-year-old men with low plasma pyridoxal 5-phosphate
- 1990
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Ingår i: Scandinavian Journal of Clinical & Laboratory Investigation. - : Informa UK Limited. - 1502-7686 .- 0036-5513. ; 50:8, s. 873-877
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Tidskriftsartikel (refereegranskat)abstract
- We have previously observed that pyridoxine treatment reduced plasma total cholesterol (TC) and low-density lipoprotein (LDL) cholesterol concentrations and increased antithrombin III (AT III) activity in atherosclerotic patients with subnormal plasma pyridoxal 5-phosphate (PLP) levels. In order to confirm these results, we selected 17 males with low plasma PLP levels from a group of 122 80-year-old males in whom PLP has been determined. After supplementation with 120 mg of pyridoxine per day for 8 weeks their mean plasma TC and LDL cholesterol concentrations were decreased by 10% (p less than 0.01) and 17% (p less than 0.001), respectively. There was no effect on high-density lipoprotein cholesterol and triglycerides but plasma AT III activity was increased by 6% (p less than 0.05). The mechanism by which pyridoxine acts is unclear but it is hypothesized that pyridoxine-derived PLP may enhance the catabolism of LDL and the activity of AT III by inhibiting their glycosylation.
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