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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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As in the principal industrial countries, Brazilian women have lived longer than men. However, paradoxically, women present higher morbidity indicators than men. Knowledge of the Brazilian pattern regarding this matter could be a useful contribution to an understanding of their determinants in our specific reality, as well as enabling us to foresee future trends that would make it possible to plan adjustment in the health system. A morbidity study based on data from the National Household Sample Survey (PNAD/IBGE), was undertaken in ten Brazilian states in 1986 with this in view. Coefficients of the prevalence of perceived morbidity, demand for and utilization of health services according to sex, standardized by age and using the direct method, were built up. As a measurement of the differentials, sex ratios were calculated. The excess of perceived morbidity in women was constant in all the regions. The sex differential in the utilization of health services showed regional variations, suggesting a relationship with the health services supply. Sex differentials were not observed in childhood; the highest values were found during the woman's reproductive period, decreasing sharply after 60 years of age. The pattern is very similar in all regions. In the present study, the findings could be partially explained by the methodology adopted, but they are similar to the findings reported in other countries. The intense transformations in the reproductive pattern and in the social status of Brazilian women probably have a considerable impact on the health status and on the recourse to health services, not as yet evaluated.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
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Ulisses Xavier da Silva Neto Ivaldo Gomes de Moraes Vania Portela Ditzel Westphalen Renato Menezes Everdan Carneiro Luiz Fernando Fariniuk 《Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics》2007,104(2):e53-e57
OBJECTIVE: The aim of this study was to measure leakage of 4 resin-based sealers. STUDY DESIGN: Four groups of premolars (n = 60) were prepared using GT Rotary files and the crown-down technique and filled by the single-cone technique with AH26, AHPlus, EndoREZ, and an experimental MBP as sealer. Leakage was measured using the fluid filtration method after 15, 30, and 60 days and determined as microL/min(-1) x 10 psi. RESULTS: Statistical analysis by ANOVA and Tukey HSD test indicated that root fillings with AH Plus and the MBP showed lower leakage values after 15 days (P < .05). At 30 days, AH26 presented higher leakage values when compared to other sealers (P < .05). At 60 days, MBP and AH Plus presented the lower leakage values, differing significantly from EndoREZ (P < .05). CONCLUSION: It was observed that AH Plus and the experimental MBP showed lower leakage after 60 days than AH 26 and EndoREZ. 相似文献
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AP de Moraes† ÉÂG de Arruda† MAV Vitoriano† MO de Moraes Filho‡ FÂF Bezerra‡ E de Magalhães Holanda§ MEA de Moraes‡ 《Journal of the European Academy of Dermatology and Venereology》2007,21(5):596-601
BACKGROUND: Seborrhoeic dermatitis (SD) is a common dermatosis in human immunodeficiency virus (HIV)-positive patients, many of whom do not respond satisfactorily to conventional topical treatments such as corticosteroids and antifungals. OBJECTIVE: A pilot study to investigate the efficacy and tolerability of pimecrolimus cream 1% in HIV-positive patients with facial SD. METHODS: In a single-centre study, 21 HIV-infected patients with mild to severe SD were treated twice daily with pimecrolimus cream 1% for 14 days. Thereafter, treatment was discontinued and patients followed up for 5 weeks. Skin involvement at baseline and on days 7, 14, 21, 35 and 49 was assessed using a four-point clinical score and digital photography. MAIN OUTCOME MEASURES: Efficacy and safety of pimecrolimus cream 1% treatment and incidence of relapse in the follow-up phase. Results Marked improvement was seen in clinical parameters at day 7, with >or= 90% patients clear of symptoms at day 14. Relapse was observed at day 35 but signs were milder than at baseline. All patients responded to therapy, despite their immunological status. Pimecrolimus did not alter CD4(+) and CD8(+) T-cell counts or viral load during the treatment period. CONCLUSION: Pimecrolimus cream represents a new, effective therapeutic option for facial SD in HIV patients. 相似文献
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Maria De Ftima V. Marques Cristiane A. Henriques Jos Luiz F. Monteiro Sonia M. C. Menezes Fernanda M. B. Coutinho 《Macromolecular chemistry and physics.》1997,198(11):3709-3717
Y zeolites with different sodium contents and a sodium mordenite were evaluated as support for bis(cyclopentadienyl)zirconium dichloride as catalyst for ethylene polymerization. The results showed that, although the activities of the supported catalysts were lower than that of the homogeneous system, the average molecular weight of the polyethylene produced from the former was in general much higher than that of the polymer produced in solution. Contrary to the expected trend if the specific area was the dominant factor for catalyst activity, the best catalyst was the one supported on NaM zeolite. Thus, our results indicate that the concentration of framework aluminium atoms is the dominant factor, but that the contribution of the external surface is also important. 相似文献