Health Services Access Inequalities in Brazil Result in Poorer Outcomes for Stage III NSCLC-RELANCE/LACOG 0118.

Introduction: Stage III NSCLC is a heterogeneous disease, representing approximately one-third of newly diagnosed lung cancers. Brazil lacks detailed information regarding stage distribution, treatment patterns, survival, and prognostic variables in locally advanced NSCLC. Methods: RELANCE/LACOG 0118 is an observational, retrospective cohort study assessing sociodemographic and clinical data of patients diagnosed with having stage III NSCLC from January 2015 to June 2019, regardless of treatment received. The study was conducted across 13 cancer centers in Brazil. Disease status and survival data were collected up to June 2021. Descriptive statistics, survival analyses, and a multivariable Cox regression model were performed. p values less than 0.05 were considered significant. Results: We recruited 403 patients with stage III NSCLC. Most were male (64.0%), White (31.5%), and smokers or former smokers (86.1%). Most patients had public health insurance (67.5%), had stage IIIA disease (63.2%), and were treated with concurrent chemoradiation (53.1%). The median follow-up time was 33.83 months (95% confidence interval [CI]: 30.43-37.50). Median overall survival (OS) was 27.97 months (95% CI: 21.57-31.73), and median progression-free survival was 11.23 months (95% CI: 10.70-12.77). The type of treatment was independently associated with OS and progression-free survival, whereas the types of health insurance and histology were independent predictors of OS only. Conclusions: Brazilian patients with stage III NSCLC with public health insurance are diagnosed later and have poorer OS. Nevertheless, patients with access to adequate treatment have outcomes similar to those reported in the pivotal trials. Health policy should be improved to make lung cancer diagnosis faster and guarantee prompt access to adequate treatment in Brazil.

Mesothelioma in situ with regressive malignant pleural effusion and an unexpected evolution: A case report.

Malignant pleural mesothelioma (MPM) is an aggressive neoplasm that originates from hyperplasia and metaplasia of the mesothelial cells that cover the pleural cavity. Previous exposure to asbestos is the main risk factor. Since MPM is often diagnosed at an advanced stage with rapid evolution and resistance to treatment, it is associated with an unfavorable outcome. Mesothelioma in situ (MIS) has been postulated as a preinvasive phase of MPM; however, its diagnostic criteria have been defined only recently. Diagnosis of MIS may represent an opportunity for early therapies with better results, but the optimal approach has not been defined thus far. Here, we report on a case of a 74-year-old man with right-sided pleural effusion and a previous history of occupational exposure to asbestos for 9 years who was diagnosed with MIS after a latency of 36 years. During follow-up, spontaneous disease regression was observed 5 months after the initial diagnosis; however, it recurred in the form of invasive epithelioid MPM. There is a paucity of literature on MIS and its evolution; however, our case provides relevant knowledge of this unusual behavior, which is important to define follow-up and therapeutic strategies for future cases.

What happens to the pleural space affected by malignant effusion after bedside pleurodesis?

BACKGROUND AND OBJECTIVES: Evaluate radiological characteristics of postpleurodesis pleural space of patients with recurrent malignant pleural effusion(RMPE). METHODS: Prospective cohort study including patients with RPME treated with bedside pleurodesis. We used CT scans to calculate pleural cavity volume immediately before pleurodesis(iCT) and 30 days after(CT30). Radiological evolution was calculated by the difference between pleural volumes on CT30 and iCT(Δvolume). We categorized initial pleural volume as small(<500 mL) or large space(≥500 mL) and Δvolume as positive(>254.49 mL), unchanged(≥-268.77-≤ 254.49 mL), or negative(<-268.77 mL). Futhermore, we analyzed clinical effectiveness, pleural elastance, and adverse events. RESULTS: A total of 87 patients were analyzed. Pleural volume varied from 35-2750 mL in iCT and from 0-2995 mL in CT30(P = 0.753). A total of 54 patients had initial small pleural space(62.06%) and 33 large(37.93%). Clinical failure occurred in 7.4% of small space group and in 24.6% of large(P = 0.051, OR4.0(CI:1.098-14.570)). In small space group, 27.77% evolved with positive, 66.66% with unchanged and 5.55% with negative Δvolume. In the large space group these numbers were respectively 21.21%, 27.27%, and 51.51%. CONCLUSIONS: There is significant variability on pleural space volume. However, pleural volume remains unchanged in many cases. Besides that, more than half patients with initial large space coursed with relevant reduction. Finally, patients with initial small space presented a greater chance of clinical success.

Measurement of the Inter-Rater Reliability Rate Is Mandatory for Improving the Quality of a Medical Database: Experience with the Paulista Lung Cancer Registry.

BACKGROUND: Database quality measurement should be considered a mandatory step to ensure an adequate level of confidence in data used for research and quality improvement. Several metrics have been described in the literature, but no standardized approach has been established. We aimed to describe a methodological approach applied to measure the quality and inter-rater reliability of a regional multicentric thoracic surgical database (Paulista Lung Cancer Registry). STUDY DESIGN: Data from the first 3 years of the Paulista Lung Cancer Registry underwent an audit process with 3 metrics: completeness, consistency, and inter-rater reliability. The first 2 methods were applied to the whole data set, and the last method was calculated using 100 cases randomized for direct auditing. Inter-rater reliability was evaluated using percentage of agreement between the data collector and auditor and through calculation of Cohen's κ and intraclass correlation. RESULTS: The overall completeness per section ranged from 0.88 to 1.00, and the overall consistency was 0.96. Inter-rater reliability showed many variables with high disagreement (>10%). For numerical variables, intraclass correlation was a better metric than inter-rater reliability. Cohen's κ showed that most variables had moderate to substantial agreement. CONCLUSIONS: The methodological approach applied to the Paulista Lung Cancer Registry showed that completeness and consistency metrics did not sufficiently reflect the real quality status of a database. The inter-rater reliability associated with κ and intraclass correlation was a better quality metric than completeness and consistency metrics because it could determine the reliability of specific variables used in research or benchmark reports. This report can be a paradigm for future studies of data quality measurement.

Lung reaeration and reventilation after aspiration of pleural effusions. A study using electrical impedance tomography.

RATIONALE: Lung reexpansion after pleural effusion aspiration is composed of reaeration and reventilation. Previous studies evaluated only the immediate reaeration, and the reventilation was not evaluated using a direct lung ventilation measurement method. Also, indirect evidence indicates that the effusion could cause ventilator asynchrony between the lungs. The electrical impedance tomography can directly and reliably measure lung reaeration, reventilation, and synchrony. OBJECTIVES: To evaluate lung reaeration, reventilation, and ventilator synchrony before and over 1 hour after a pleural aspiration. METHODS: A prospective and observational study using electrical impedance tomography to measure the lung reaeration, reventilation, and ventilatory synchrony between the lungs (through phase angle) before and over 1 hour after the pleural aspiration of 22 patients with unilateral malignant effusions. MEASUREMENTS AND MAIN RESULTS: The ipsilateral (affected by the effusion) (P < 0.001) and contralateral (P = 0.008) lung reaerated immediately without further reaeration over the next hour. However, the reventilation response was heterogeneous, with patients increasing, maintaining, or decreasing ipsilateral lung ventilation after the aspiration. The pleural effusion had caused ventilatory asynchrony (93 ± 71 degrees) that was immediately reversed by the aspiration. In some patients, the asynchrony was so extreme that one lung was inflating while the other was deflating, causing paradoxical ventilation. CONCLUSIONS: After a pleural effusion aspiration, the ipsilateral and contralateral lungs reaerate immediately without further reaeration over the next hour. The reventilation shows a heterogeneous response, with patients increasing, maintaining, or decreasing the ipsilateral lung ventilation. The pleural effusion causes a ventilatory asynchrony between the lungs that is immediately decreased by the aspiration. In some patients, that asynchrony is so intense that it causes paradoxical ventilation.

Effectiveness and safety of iodopovidone in an experimental pleurodesis model.

OBJECTIVES: Chemical pleurodesis is an important therapeutic tool to control recurrent malignant pleural effusion. Among the various sclerosing agents, iodopovidone is considered effective and safe. However, in a recent study, ocular changes were described after iodopovidone was used in recurrent pneumothorax. The aim of the study was to evaluate the efficacy and morbidity of iodopovidone pleurodesis in an experimental model. METHODS: New Zealand rabbits were submitted to intrapleural injection of iodopovidone at concentrations of 2%, 4% and 10%. Biochemical (lactic dehydrogenase, proteins, triiodothyronine, free thyroxine, urea and creatinine) and immunological (Interleukin-8 [IL-8], VEGF and TGFß) parameters were measured in the pleural fluid and blood. After 1, 3, 7, 14 and 28 days, groups of animals were euthanized, and macro- (pleura) and microscopic (pleura and retina) analyses were performed. RESULTS: An early pleural inflammatory response with low systemic repercussion was observed without corresponding changes in thyroid or renal function. The higher concentrations (4% and 10%) correlated with greater initial exudation, and maximum pleural thickening was observed after 28 days. No changes were observed in the retinal pigment epithelium of the rabbits. CONCLUSION: Iodopovidone is considered to be an effective and safe sclerosing agent in this animal model. However, its efficacy, tolerance and safety in humans should be further evaluated.

Effectiveness and safety of iodopovidone in an experimental pleurodesis model

OBJECTIVES: Chemical pleurodesis is an important therapeutic tool to control recurrent malignant pleural effusion. Among the various sclerosing agents, iodopovidone is considered effective and safe. However, in a recent study, ocular changes were described after iodopovidone was used in recurrent pneumothorax. The aim of the study was to evaluate the efficacy and morbidity of iodopovidone pleurodesis in an experimental model. METHODS: New Zealand rabbits were submitted to intrapleural injection of iodopovidone at concentrations of 2%, 4% and 10%. Biochemical (lactic dehydrogenase, proteins, triiodothyronine, free thyroxine, urea and creatinine) and immunological (Interleukin-8 [IL-8], VEGF and TGFβ) parameters were measured in the pleural fluid and blood. After 1, 3, 7, 14 and 28 days, groups of animals were euthanized, and macro- (pleura) and microscopic (pleura and retina) analyses were performed. RESULTS: An early pleural inflammatory response with low systemic repercussion was observed without corresponding changes in thyroid or renal function. The higher concentrations (4% and 10%) correlated with greater initial exudation, and maximum pleural thickening was observed after 28 days. No changes were observed in the retinal pigment epithelium of the rabbits. CONCLUSION: Iodopovidone is considered to be an effective and safe sclerosing agent in this animal model. However, its efficacy, tolerance and safety in humans should be further evaluated. .

Pleural tuberculosis: is radiological evidence of pulmonary-associated disease related to the exacerbation of the inflammatory response?

OBJECTIVE: Pleural tuberculosis is the most frequently occurring form of extra pulmonary disease in adults. In up to 40% of cases, the lung parenchyma is concomitantly involved, which can have an epidemiological impact. This study aims to evaluate the pleural and systemic inflammatory response of patients with pleural or pleuropulmonary tuberculosis. METHODS: A prospective study of 39 patients with confirmed pleural tuberculosis. After thoracentesis, a high resolution chest tomography was performed to evaluate the pulmonary involvement. Of the 39 patients, 20 exhibited only pleural effusion, and high resolution chest tomography revealed active associated-pulmonary disease in 19 patients. The total protein, lactic dehydrogenase, adenosine deaminase, vascular endothelial growth factor, interleukin-8, tumor necrosis factor-α, and transforming growth factor-ß(1) levels were quantified in the patient serum and pleural fluid. RESULTS: All of the effusions were exudates with high levels of adenosine deaminase. The levels of vascular endothelial growth factor and transforming growth factor-ß(1) were increased in the blood and pleural fluid of all of the patients with pleural tuberculosis, with no differences between the two forms of tuberculosis. The tumor necrosis factor-α levels were significantly higher in the pleural fluid of the patients with the pleuropulmonary form of tuberculosis. The interleukin-8 levels were high in the pleural fluid of all of the patients, without any differences between the forms of tuberculosis. CONCLUSION: Tumor necrosis factor-α was the single cytokine that significantly increased in the pleural fluid of the patients with pulmonary involvement. However, an overlap in the results does not permit us to suggest that cytokine is a biological marker of concomitant parenchymal involvement. Although high resolution chest tomography can be useful in identifying these patients, the investigation of fast acid bacilli and cultures for M. tuberculosis in the sputum is recommended for all patients who are diagnosed with pleural tuberculosis.

Pleural tuberculosis: is radiological evidence of pulmonary-associated disease related to the exacerbation of the inflammatory response?

OBJECTIVE: Pleural tuberculosis is the most frequently occurring form of extra pulmonary disease in adults. In up to 40% of cases, the lung parenchyma is concomitantly involved, which can have an epidemiological impact. This study aims to evaluate the pleural and systemic inflammatory response of patients with pleural or pleuropulmonary tuberculosis. METHODS: A prospective study of 39 patients with confirmed pleural tuberculosis. After thoracentesis, a high resolution chest tomography was performed to evaluate the pulmonary involvement. Of the 39 patients, 20 exhibited only pleural effusion, and high resolution chest tomography revealed active associated-pulmonary disease in 19 patients. The total protein, lactic dehydrogenase, adenosine deaminase, vascular endothelial growth factor, interleukin-8, tumor necrosis factor-α, and transforming growth factor-β1 levels were quantified in the patient serum and pleural fluid. RESULTS: All of the effusions were exudates with high levels of adenosine deaminase. The levels of vascular endothelial growth factor and transforming growth factor-β1 were increased in the blood and pleural fluid of all of the patients with pleural tuberculosis, with no differences between the two forms of tuberculosis. The tumor necrosis factor-α levels were significantly higher in the pleural fluid of the patients with the pleuropulmonary form of tuberculosis. The interleukin-8 levels were high in the pleural fluid of all of the patients, without any differences between the forms of tuberculosis. CONCLUSION: Tumor necrosis factor-α was the single cytokine that significantly increased in the pleural fluid of the patients with pulmonary involvement. However, an overlap in the results does not permit us to suggest that cytokine is a biological marker of concomitant parenchymal involvement. Although high resolution chest tomography can be useful in identifying these patients, the investigation of fast acid bacilli and cultures for M. tuberculosis in the sputum is recommended for all patients who are diagnosed with pleural tuberculosis.

Pulmonary involvement in pleural tuberculosis: how often does it mean disease activity?

OBJECTIVE: To evaluate in chest X-rays and high-resolution computed tomographies of patients with pleural tuberculosis, the incidence of parenchymal and mediastinal lung lesions suggestive of active disease. METHODS: Prospective study (2008-2009) evaluating the radiographic and tomographic abnormalities of 88 HIV-negative patients with pleural tuberculosis (unilateral effusion). The images were reviewed by 3 independent specialists, and the observed changes were classified according to previously established criteria: presence or absence of signs suggestive of disease activity, and nonspecific findings. RESULTS: Abnormal changes were observed in chest X-rays of 22 (25%) patients and in the computed tomography of 55 (63%). Images compatible with active pulmonary tuberculosis were detected by radiography in 9 (10%) patients and by tomography in 38 (43%). Only 4 (4.5%) patients had tomography images suggestive of residual disease. CONCLUSION: The present study demonstrates that pulmonary involvement is quite common in pleural tuberculosis. This finding is mainly observed in high-resolution computed tomography and has important epidemiological implications, since patients with pleural tuberculosis are significant sources of infection and disease dissemination.

Estenoses benignas da via aérea: tratamento endoscópico / Benign airway stenosis: endoscopic treatment

O objetivo do presente trabalho é uma revisão do tratamento endoscópico das estenoses laringotraqueais benignas. O tratamento de eleição para este tipo de estenose é a ressecção com anastomose primária. Entretanto, nem sempre essa situação pode ser alcançada devido a natureza, extensão e localização das estenoses. O tratamento endoscópico é uma alternativa em casos nos quais a ressecção não é possível ou após complicações ou insucessos nas ressecções prévias. O tratamento endoscópico inclui dilatações, ressecção endoscópica com eletrocautério, laser, argon plasma coagulation, crioterapia, braquiterapia e a utilização de endopróteses. Todos esses métodos de dilatação mecânica produzem um resultado imediato satisfatório, com aumento da via aérea e melhora dos sintomas clínicos, mas a durabilidade da terapia continua problemática. Em poucos dias ou semanas retornam os sintomas que obrigam repetidas reintervenções. As endopróteses são divididas em: silicone rígido e metálico autoexpansível. As endopróteses de silicone são as mais utilizadas na literatura e com o maior seguimento em longo prazo. As endopróteses metálicas autoexpansíveis foram introduzidas mais recentemente, e, devido à facilidade de aplicação, ocorreram abusos na utilização com diversas complicações. Mais recentemente, as endopróteses chamadas “híbridas” congregam componentes metálicos autoexpansíveis com uma cobertura de silicone.

This review focuses on endoscopic treatment of benign laryngotracheal stenoses. The standard treatment for laryngotracheal stenoses is surgical resection and reconstruction of the primary airway. However, when surgical resection is not feasible due to the nature, extent, or location of the stenosis, endoscopy presents an alternative for treating complications and for the management of previous unsuccessful resections. Endoscopic treatment includes electrocauterization, laser resection, argon plasma coagulation, cryotherapy, brachytherapy,and stent placement. Although endoluminal approaches have been shown to improve luminal patency, none have produced consistent results and the durability of their effects remains problematic, resulting in a high rate of repeat interventions. There are two basic types of stents: silicon stents; and self-expandable metal stents. Silicon stents are less expensive, more widely available, and still the most often studied. However, the newer, metal stents are easier to insert and position. Therefore, metal stents have been overused, resulting in complications. Recently, “hybrid” stents, such as one composed of a metal scaffold and a silicon coating with self-expandable capabilities, have been introduced.

Efficacy and safety of iodopovidone pleurodesis in malignant pleural effusions.

BACKGROUND AND OBJECTIVE: Pleurodesis is one of the best methods of controlling malignant pleural effusions (MPE), a distressing complication of metastatic disease. In recent studies of a wide range of pleural diseases, iodopovidone was used as a sclerosing agent for pleurodesis and demonstrated good results with low morbidity. The aim of this study was to evaluate the efficacy and safety of iodopovidone pleurodesis in MPE. METHODS: A retrospective analysis was performed on patients with MPE who underwent pleurodesis at our institution between 2005 and 2008. All patients underwent instillation of 20 mL of 10% iodopovidone, 80 mL of normal saline and 2 mg/kg of lidocaine through a chest tube, which was clamped for 2 h. The tube was removed when the daily output of fluid was <200 mL. Data on the requirement for additional pleural procedures, adverse events and survival were collected. RESULTS: Sixty-one pleurodesis procedures were performed in 54 patients. No procedure-related mortality was observed. Adverse events occurred after 11 (18%) pleurodesis procedures. The most frequent complication was mild thoracic pain that occurred immediately after 10 (16.4%) procedures, and one patient developed pleural empyema that was treated with drainage and antibiotics. A success rate of 98.4% was observed. Except for the patient who developed pleural empyema, none of the other patients had recurrences of pleural fluid or required additional pleural procedures during the follow-up period (mean of 5.6 months). CONCLUSIONS: Iodopovidone pleurodesis was successful and was associated with only a few minor complications. It appears to be a good option for the management of recurrent MPE.

Pulmonary artery sarcoma mimicking a pulmonary artery aneurysm.

Pulmonary artery sarcoma is an uncommon neoplasm, and its clinical and radiological presentation usually simulates chronic thromboembolic disease. We present the case of a 77-year-old woman admitted with dyspnea, chest pain, and hemoptysis. A chest computed tomographic scan showed moderate right-sided pleural effusion and a saccular dilatation of the interlobar portion of the right pulmonary artery, which was filled with contrast and surrounded by an irregular soft-tissue attenuation mass, suggesting a ruptured pulmonary artery aneurysm. The patient was operated on. Intraoperatively, a pseudoaneurysm and a solid mass were identified within the oblique fissure around the interlobar artery. Therefore, a right pneumonectomy was performed. Definitive pathologic examination was consistent with pulmonary artery sarcoma. The patient had a good outcome and is free of disease 2 years after surgery.

Full-thickness chest wall resection for recurrent breast phyllodes tumor.

Phyllodes tumor is a rare breast neoplasm. We present the case of a woman who underwent multiple surgical procedures for phyllodes tumor treatment. Even after bilateral mastectomy and radiotherapy, local recurrences developed. We performed a full-thickness chest wall resection with wide margins, a procedure rarely reported in medical literature for this purpose. Only after this approach did we obtain disease control, with no signs of further recurrence at 4 years' follow-up.

Acidos graxos de cadeia curta e doenças colorretais / Short-chain fatty acids and colorectal diseases

O cólon humano contribui de maneira importante para a fermentaçäo de polissacárides näo absorvidos, produzindo ácidos graxos de cadeia curta (AGCC). Este artigo analisa a importância fisiológica dos AGCC para os colonócitos e as perspectivas de sua utilizaçäo clínica no tratamento das doenças colorretais. Diversos efeitos benéficos säo atribuídos ao processo de fermentaçäo e à subsequente produçäo de AGCC, como a contribuiçäo às necessidades energéticas, à manutençäo da integridade e funçäo da mucosa colônica e implicaçöes no metabolismo nitrogenado, de lipídes e glicídios. Além disso, diversas afecçöes colorretais tem sido relacionadas a deficiência de AGCC, como a colite por desuso, colite ulcerativa, bolsite pós-proctocolectomia com anastomose íleo-anal e câncer colorretal. Por este motivo, o fornecimento de AGCC diretamente à mucosa intestinal ou por via intravenosa tem sido preconizado em diversas condiçöes clínicas

Importância da anatomia da circulaçäo coronária atrial na operaçäo de Cox para controle da fibrilaçäo atrial / The importance of atrial coronary circulation on Cox surgery for control atrial fibrillation

Com o advento de novas técnicas cirúrgicas para o tratamento das arritmias cardíacas, em especial da fibrilaçäo atrial, como a cirurgia de Cox, o conhecimento das características e do trajeto das artérias coronárias atriais assumiu grande importância. O objetivo deste trabalho é o estudo desta circulaçäo e a definiçäo dos padröes de irrigaçäo atrial. Para tanto, utilizamos 30 coraçöes a fresco de indivíduos sem cardiopatia prévia, cujas artérias coronárias e ramos foram visibilizados através de injeçäo de resina vinílica corada com tinta laca preta, seguida de cuidadosa dissecçäo. Após avaliaçäo macroscópica das peças, näo foram encontrados padröes de irrigaçäo uniforme dos átrios. Porém, a artéria do nó sinoatrial (ANSA), quando analisada isoladamente, revelou näo apenas padröes de origem, como também padröes de trajeto. Foram descritos 7 padröes de origem e trajeto da ANSA, considerando-se pontos de referências da estrutura anatômica dos átrios. Os padröes descritos, diferente dos encontrados por outros autores, säo de fácil interpretaçäo e de aplicabilidade direta em técnicas cirúrgicas que abordam os átrios.

Padronizaçäo tecnica e histologica de colite experimental com acido trinitrobenzenosulfonico (TNBS) / Technical and histological standardization of experimental colitis with trinitrobenzene sulfonic acid

A tentativa de reproduzir doença inflamatoria experimental no colon gerou varios modelos de colite. Desde os trabalhos pioneiros de Morris e col., soluçöes de acido 2,4,6-trinitrobenzesulfonico (TNBS) vem sendo utilizadas em diferentes doses. Os objetivos deste trabalho foram padronizar a induçäo de colite, avaliar os efeitos clinicos (peso, ingestäo diaria, diarreia) e intestinais (alteracçös morfologicas do intestino inflamado) da utilizaçäo de soluçöes com TNBS e atestar a reprodutibilidade do processo inflamatorio. Utilizaram-se ratos Wistar submetidos a introduçäo por via retal de 2,5 ml de soluçöes contendo diferentes concentraçöes de TNBS a 5 por cento diluido em etanol...

Postoperative total parenteral nutrition

O trauma cirurgico induz complexas alteracoes fisiologicas que levam ao catabolismo e deplecao da massa celular corporea. Esta reacao geralmente e moderada, mas pode ser exacerbada por desnutricao previa ou complicacoes pos-operatorias. Para evitar repercussoes metabolicas graves, terapia nutricional deve ser prescrita, usando a via enteral sempre que possivel. Nutricao parenteral total pos-operatoria e indicada a pacientes recebendo nutricao parenteral total pre-operatoria, gravemente desnutridos antes de cirurgia de grande porte, incapazes de se alimentarem satisfatoriamente por sete dias ou mais, ou apresentacoes pos-operatorias severas. Nutricao parenteral total pos-operatoria deve durar por pelo menos sete dias...