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排序方式: 共有237条查询结果,搜索用时 15 毫秒
1.
Neuroimaging in Pineal Tumors 总被引:4,自引:0,他引:4
F Reis MD AV Faria MD PhD VA Zanardi MD PhD JR Menezes MD F Cendes MD PhD LS Queiroz MD PhD 《Journal of neuroimaging》2006,16(1):52-58
BACKGROUND AND PURPOSE: The authors report radiological findings in 11 tumors in the pineal region, which were histologically diagnosed as germinomas, pineocytomas pineoblastomas, ependymomas, teratomas, and astrocytomas. METHODS: Computed tomography (CT) was performed in seven patients and magnetic resonance imaging (MRI) was performed in all patients. RESULTS: CT showed a solid or solid/cystic mass with variable contrast enhancement. MRI showed a heterogeneous mass, with hypointense signal on T1 and iso/hyperintense signal on T2-weighted images (WI) and gadolinium enhancement. Extension to adjacent structures occurred in five patients and spread through the cerebral spinal fluid (CSF) in two. CONCLUSIONS: Pineal region tumors have no pathognomonic imaging pattern. MRI and CT are complementary in diagnosis and are important to determine localization, extension, and meningeal spread. 相似文献
2.
3.
Myo-inositol transport in the central nervous system 总被引:18,自引:0,他引:18
4.
A Jablensky 《Acta psychiatrica Belgica》1986,86(5):556-567
Classification is a fundamental cognitive activity of ordering the objects of the external and the internal (phenomenological) world into sets on the basis of their relationships. The strategies employed vary from the search of "focal essences" identifying natural classes to the purely statistical approach of numerical taxonomy. Medical classifications are eclectic and pragmatic, without clear predominance of any single strategy. In addition to having its share of the general problems of medical taxonomies, classification in psychiatry has to face the dilemma of classifying diseases or people and their problems. The implications of this for the 10th revision of ICD are examined, and criteria for a good classification are tentatively laid down. 相似文献
5.
Assen Jablensky Max A. Woodbury 《European archives of psychiatry and clinical neuroscience》1995,245(4-5):202-209
Grade of Membership (GoM) analysis, a multivariate classification technique based on fuzzy-set mathematics, was applied to the demographic, history, and mental-state data on 53 dementia praecox cases and 134 manic-depressive insanity cases admitted to Kraepelin's University Psychiatric Clinic in Munich in 1908. The original data recorded by Kraepelin and his collaborators on specialZählkarten (counting cards) were rated and coded in terms of the Present State Examination (PSE) Syndrome Check List. The statistical analysis resulted in a high degree of replication of Kraepelin's clinical entities. However, the dichotomy of dementia praecox and manic-depressive insanity was not fully supported. The catatonic syndrome tended to occupy an intermediate position between the two major psychoses. The possibility is discussed that catatonia in Kraepelin's time shared certain clinical features with the later diagnostic groupings of schizoaffective disorder, cycloid psychoses, and other atypical forms of psychotic illnesses. 相似文献
6.
Lawrence D Jablensky AV Holman CD Pinder TJ 《Social psychiatry and psychiatric epidemiology》2000,35(8):341-347
Background: The aim was to examine mortality in psychiatric patients in Western Australia (WA), over a time period of considerable change
in the delivery of mental health services. Methods: A population-based record linkage analysis was undertaken to quantify mortality among people with mental illness in WA.
Mortality rates were calculated in users of mental health services and compared with rates in the whole population of WA.
Trends in mortality were also examined using relative survival analysis, and proportional hazards regression. Results: The overall mortality rate ratio was 2.57 in males (95% CI: 2.51–2.64), and 2.18 in females (2.12–2.24). The highest cause-specific
mortality rate ratio was for deaths due to suicide [RR: 7.37 in males (95% CI: 6.74–8.05) and 8.38 in females (95% CI: 7.11–9.89)],
with mortality rate ratios being significantly greater than 1 for all other major causes of death. A relative survival analysis
found that the excess mortality risk was concentrated in the first few years after first contact with mental health services.
Proportional hazards regression analysis found a slight elevation of mortality rates over time. Conclusions: Mortality among psychiatric patients remains high and appears to be increasing. Highest excess mortality rate is associated
with suicide, but mortality rates are significantly elevated for all major causes of death.
Accepted: 10 April 2000 相似文献
7.
Labial adhesions are usually seen in early childhood or in the postmenopausal years, but this clinical entity is rarely seen in the reproductive years. We report a case of labial adhesion with acute urinary retention secondary to Bartholin's abscess in a reproductive‐aged woman with normal menstrual periods. We emphasize the possible occurrence of labial adhesion following Bartholin's abscess in the reproductive years with normal estrogen levels. 相似文献
8.
Warkentin TE; Hayward CP; Boshkov LK; Santos AV; Sheppard JA; Bode AP; Kelton JG 《Blood》1994,84(11):3691-3699
Heparin-induced thrombocytopenia is characterized by moderate thrombocytopenia and thrombotic complications, whereas quinine/quinidine-induced thrombocytopenia usually presents with severe thrombocytopenia and bleeding. Using flow cytometry and assays of procoagulant activity, we investigated whether sera from patients with these immune drug reactions could stimulate normal platelets to generate platelet-derived microparticles with procoagulant activity. Sera or purified IgG from patients with heparin-induced thrombocytopenia stimulated the formation of platelet-derived microparticles in a heparin-dependent fashion. Further studies showed that heparin-induced thrombocytopenia sera also produced a marked increase in procoagulant activity. In contrast, sera from patients with quinine- or quinidine-induced thrombocytopenia did not generate platelet-derived microparticles nor generate increased procoagulant activity. However, quinine/quinidine-induced thrombocytopenia sera produced a significant increase in the binding of IgG to platelets in a drug-dependent fashion, whereas sera from patients with heparin-induced thrombocytopenia demonstrated no drug-dependent binding of IgG to platelets. We also observed increased levels of circulating microparticles in patients with acute heparin-induced thrombocytopenia compared with control patients. Our observations indicate that the generation of procoagulant platelet-derived microparticles in vivo is a plausible explanation for the thrombotic complications observed in some patients with heparin-induced thrombocytopenia. 相似文献
9.
A humanised tissue‐engineered bone model allows species‐specific breast cancer‐related bone metastasis in vivo
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VMC Quent AV Taubenberger JC Reichert LC Martine JA Clements DW Hutmacher D Loessner 《Journal of tissue engineering and regenerative medicine》2018,12(2):494-504
Bone metastases frequently occur in the advanced stages of breast cancer. At this stage, the disease is deemed incurable. To date, the mechanisms of breast cancer‐related metastasis to bone are poorly understood. This may be attributed to the lack of appropriate animal models to investigate the complex cancer cell–bone interactions. In this study, two established tissue‐engineered bone constructs (TEBCs) were applied to a breast cancer‐related metastasis model. A cylindrical medical‐grade polycaprolactone‐tricalcium phosphate scaffold produced by fused deposition modelling (scaffold 1) was compared with a tubular calcium phosphate‐coated polycaprolactone scaffold fabricated by solution electrospinning (scaffold 2) for their potential to generate ectopic humanised bone in NOD/SCID mice. While scaffold 1 was found not suitable to generate a sufficient amount of ectopic bone tissue due to poor ectopic integration, scaffold 2 showed excellent integration into the host tissue, leading to bone formation. To mimic breast cancer cell colonisation to the bone, MDA‐MB‐231, SUM1315, and MDA‐MB‐231BO breast cancer cells were cultured in polyethylene glycol‐based hydrogels and implanted adjacent to the TEBCs. Histological analysis indicated that the breast cancer cells induced an osteoclastic reaction in the TEBCs, demonstrating analogies to breast cancer‐related bone metastasis seen in patients. 相似文献
10.