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排序方式: 共有386条查询结果,搜索用时 15 毫秒
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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
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V. V. Raevsky L. I. Alexandrov A. D. Vorobyeva T. B. Golubeva E. V. Korneeva I. E. Kudriashov I. V. Kudriashova M. L. Pigareva E. Yu. Sitnikova I. S. Stashkevitch 《Neuroscience and behavioral physiology》1997,27(4):455-461
On the basis of their own data the authors postulate that the increase in sensory input during early ontogeny results in a
delay in the development of the sensory systems formed earlier. In connection with this, the sensory basis of behavioral patterns
becomes ineffective, causing their reorganization and the appearance of new forms of behavior. Limitation of sensory input
during the critical periods of development stimulates the accelerated manifestation of behavioral patterns. However, this
acceleration also has long-lasting negative effects— alterations in the processes of learning and memory in adult animals.
Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow. Translated from Zhurnal Vysshei
Nervnoi Deyatel'nosti imeni I. P. Pavlova, Vol. 47, No. 2, pp. 299–307, March–April, 1997. 相似文献
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Myo-inositol transport in the central nervous system 总被引:18,自引:0,他引:18
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F. Z. Meerson V. G. Pinelis V. B. Kosheley L. Yu. Golubeva T. V. Ryasina E. N. Arsen'eva A. L. Krushinskii T. P. Storozhevykh 《Bulletin of experimental biology and medicine》1993,116(6):1465-1467
Translated fromByulleten' Eksperimental'noi Biologii i Meditsiny, Vol. 116, N
o
12, pp. 572–574, December, 1993 相似文献
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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
10.
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