Pseudotumor Pancreático – Um caso de Tuberculose Abdominal

Tuberculosis is a frequent disease caused by Mycobacterium tuberculosis and can be present in every organ. (1,2) The authors report a 75 years old woman case of abdominal tuberculosis, who had clinical e imagiological suspicion of pancreatic cancer and in whom surgery was the key for diagnosis and treatment. Keywords: Pancreatic tuberculosis, Peripancreatic tuberculosis, Pancreatic tumour A tuberculose é uma doença causada por agentes pertencentes ao complexo constituído pelo Mycobacterium tuberculosis, que têm uma distribuição universal no organismo, podendo atingir qualquer órgão. (1,2) Os autores apresentam um caso clínico de tuberculose abdominal numa doente de 75 anos de idade, sem antecedentes de risco, na qual os exames complementares de diagnóstico orientavam para o diagnóstico de neoplasia pancreática. A cirurgia, que consistiu em biópsia excisional da lesão, foi decisiva para o diagnóstico e para o tratamento da doente. Palavras-chave: Tuberculose pancreática, Tuberculose Peripancreática, Tumor do Pâncreas.

TORÇÃO DE GRANDE EPÍPLOON APÓS BYPASS GÁSTRICO EM Y DE ROUX

A clinical case of rotation and ischemia of the great epiploon is shown. This is a rare complication. However, it must be a diagnostic hypothesis to consider in patients with acute abdomen and history of gastric bypass Roux-en-Y, not only in the postoperative period early, as it may be the cause of a late complication.É apresentado um caso clínico de rotação e isquemia do grande epíploon. Esta é uma complicação rara. Porém, deve ser uma hipótese diagnóstica a considerar em doentes com quadro de abdómen agudo e antecedentes de bypass gástrico em Y de Roux, não só no período pós-operatório imediato, pois pode ser a causa de uma complicação tardia

Chemical and spectroscopic characterization of cis-diammineplatinum α-pyridone blue in aqueous solution. Comparison with other platinum blues

The spectral, redox, and chemical properties of cis-diammineplatinum a-pyridone blue (PPB), [Pt2(NH3)4(CsH40N)2]2(N03)5-H20, in aqueous solution have been studied and compared with those of other blue platinum complexes. The extinction coefficient of the blue chromophore is a sensitive function of the anions present and of the temperature. The approximately axial electron spin resonance spectrum is characterized by g values of 2.38 and 1.976, very similar to those reported from single-crystal ESR studies. Extensive ’95Pt hyperfine interactions indicate that PPB maintains its oligomeric structure upon initial dissolution in water. The decomposition of PPB in solution has been monitored by intensity losses with time in both the blue absorption band and the ESR signal. The concomitant decrease observed indicates the correspondence of the blue chromophore with the unpaired spin. Oxidative titrations of PPB show a linear decrease in ,4680 and ESR signal intensity with the addition of 3 equiv of ceric ion per tetramer. The chemical characteristics of PPB in solution are compared to those of platinum acetamide blue (PAB), cis-diammineplatinum uracil blue (PUB), and the newly characterized cisdiammineplatinum hypoxanthine green (PHG), the first reported platinum purine “blue”. The results establish the similarity in their chemical composition and electronic structure. The electronic spectra exhibit broad absorption bands in the region 590-720 nm. These blue chromophores also depend upon the anions present. The ESR spectrum of PUB is strikingly similar to that of PPB, although of lower absolute signal intensity. This result may be due to spin-spin coupling since PUB is shown to be a longer chain oligomer. Both PHG and PAB exhibit a weak ESR transition. Oxidative titrations using ceric ion of PAB and PHG monitored spectrophotometrically show that 1.75 e-/Pt is required for the complete loss of blue color; this result is consistent with oxidation to platinum(lV) from the initial platinum formal oxidation state of 2.25. Classical reductive titrations of the cis-diammineplatinum blues to platinum mttal further support the oxidation-state assignment of 2.25. Gel electrophoresis of the cis-diammineplatinum blues, assuming the identical charge per monomeric unit, indicates the length of the oligomers to increase in the series PPB < PHG < PUB. These studies demonstrate that blue platinum complexes share the properties of mixed valency and oligomeric structure

Acoustic imaging of underground storage tank wastes: A feasibility study. Final report

The objectives for this underground storage tank (UST) imaging investigation are: (1) to assess the feasibility of using acoustic methods in UST wastes, if shown to be feasible, develop and assess imaging strategies; (2) to assess the validity of using chemical simulants for the development of acoustic methods and equipment. This investigation examined the velocity of surrogates, both salt cake and sludge surrogates. In addition collected seismic cross well data in a real tank (114-TX) on the Hanford Reservation. Lastly, drawing on the knowledge of the simulants and the estimates of the velocities of the waste in tank 114-TX the authors generated a hypothetical model of waste in a tank and showed that non-linear travel time tomographic imaging would faithfully image that stratigraphy

Chemical and spectroscopic characterization of cis-diammineplatinum α-pyridone blue in aqueous solution. Comparison with other platinum blues

The spectral, redox, and chemical properties of cis-diammineplatinum a-pyridone blue (PPB), [Pt2(NH3)4(CsH40N)2]2(N03)5-H20, in aqueous solution have been studied and compared with those of other blue platinum complexes. The extinction coefficient of the blue chromophore is a sensitive function of the anions present and of the temperature. The approximately axial electron spin resonance spectrum is characterized by g values of 2.38 and 1.976, very similar to those reported from single-crystal ESR studies. Extensive ’95Pt hyperfine interactions indicate that PPB maintains its oligomeric structure upon initial dissolution in water. The decomposition of PPB in solution has been monitored by intensity losses with time in both the blue absorption band and the ESR signal. The concomitant decrease observed indicates the correspondence of the blue chromophore with the unpaired spin. Oxidative titrations of PPB show a linear decrease in ,4680 and ESR signal intensity with the addition of 3 equiv of ceric ion per tetramer. The chemical characteristics of PPB in solution are compared to those of platinum acetamide blue (PAB), cis-diammineplatinum uracil blue (PUB), and the newly characterized cisdiammineplatinum hypoxanthine green (PHG), the first reported platinum purine “blue”. The results establish the similarity in their chemical composition and electronic structure. The electronic spectra exhibit broad absorption bands in the region 590-720 nm. These blue chromophores also depend upon the anions present. The ESR spectrum of PUB is strikingly similar to that of PPB, although of lower absolute signal intensity. This result may be due to spin-spin coupling since PUB is shown to be a longer chain oligomer. Both PHG and PAB exhibit a weak ESR transition. Oxidative titrations using ceric ion of PAB and PHG monitored spectrophotometrically show that 1.75 e-/Pt is required for the complete loss of blue color; this result is consistent with oxidation to platinum(lV) from the initial platinum formal oxidation state of 2.25. Classical reductive titrations of the cis-diammineplatinum blues to platinum mttal further support the oxidation-state assignment of 2.25. Gel electrophoresis of the cis-diammineplatinum blues, assuming the identical charge per monomeric unit, indicates the length of the oligomers to increase in the series PPB < PHG < PUB. These studies demonstrate that blue platinum complexes share the properties of mixed valency and oligomeric structure

Delayed colorectal cancer care during covid-19 pandemic (decor-19). Global perspective from an international survey

Background The widespread nature of coronavirus disease 2019 (COVID-19) has been unprecedented. We sought to analyze its global impact with a survey on colorectal cancer (CRC) care during the pandemic. Methods The impact of COVID-19 on preoperative assessment, elective surgery, and postoperative management of CRC patients was explored by a 35-item survey, which was distributed worldwide to members of surgical societies with an interest in CRC care. Respondents were divided into two comparator groups: 1) ‘delay’ group: CRC care affected by the pandemic; 2) ‘no delay’ group: unaltered CRC practice. Results A total of 1,051 respondents from 84 countries completed the survey. No substantial differences in demographics were found between the ‘delay’ (745, 70.9%) and ‘no delay’ (306, 29.1%) groups. Suspension of multidisciplinary team meetings, staff members quarantined or relocated to COVID-19 units, units fully dedicated to COVID-19 care, personal protective equipment not readily available were factors significantly associated to delays in endoscopy, radiology, surgery, histopathology and prolonged chemoradiation therapy-to-surgery intervals. In the ‘delay’ group, 48.9% of respondents reported a change in the initial surgical plan and 26.3% reported a shift from elective to urgent operations. Recovery of CRC care was associated with the status of the outbreak. Practicing in COVID-free units, no change in operative slots and staff members not relocated to COVID-19 units were statistically associated with unaltered CRC care in the ‘no delay’ group, while the geographical distribution was not. Conclusions Global changes in diagnostic and therapeutic CRC practices were evident. Changes were associated with differences in health-care delivery systems, hospital’s preparedness, resources availability, and local COVID-19 prevalence rather than geographical factors. Strategic planning is required to optimize CRC care