DALTON MARQUES CHAVES
Projetos de Pesquisa
Unidades Organizacionais
Instituto Central, Hospital das Clínicas, Faculdade de Medicina - Médico
12 resultados
Resultados de Busca
Agora exibindo 1 - 10 de 12
conferenceObject EUS-FNA OF PANCREATIC SOLID MASSES: A PROSPECTIVE RANDOMIZED TRIAL COMPARING SUCTION WITH SLOW PULL(2018) CHENG, Spencer; DANIELLE, Chacon A.; ARTIFON, Everson L.; MATUGUMA, Sergio E.; SANTOS, Marcos E. dos; SAKAI, Christiano M.; CHAVES, Dalton; MOURA, Diogo T. De; MOURA, Eduardo T.- A comparison of the efficiency of 22G versus 25G needles in EUS-FNA for solid pancreatic mass assessment: A systematic review and meta-analysis(2018) GUEDES, Hugo Goncalo; MOURA, Diogo Turiani Hourneaux de; DUARTE, Ralph Braga; CORDERO, Martin Andres Coronel; SANTOS, Marcos Eduardo Lera dos; CHENG, Spencer; MATUGUMA, Sergio Eiji; CHAVES, Dalton Marques; BERNARDO, Wanderley Marques; MOURA, Eduardo Guimaraes Hourneaux deOur aim in this study was to compare the efficiency of 25G versus 22G needles in diagnosing solid pancreatic lesions by EUS-FNA. We performed a systematic review and meta-analysis. Studies were identified in five databases using an extensive search strategy. Only randomized trials comparing 22G and 25G needles were included. The results were analyzed by fixed and random effects. A total of 504 studies were found in the search, among which 4 randomized studies were selected for inclusion in the analysis. A total of 462 patients were evaluated (233: 25G needle/229: 22G needle). The diagnostic sensitivity was 93% for the 25G needle and 91% for the 22G needle. The specificity of the 25G needle was 87%, and that of the 22G needle was 83%. The positive likelihood ratio was 4.57 for the 25G needle and 4.26 for the 22G needle. The area under the sROC curve for the 25G needle was 0.9705, and it was 0.9795 for the 22G needle, with no statistically significant difference between them (p=0.497). Based on randomized studies, this meta-analysis did not demonstrate a significant difference between the 22G and 25G needles used during EUS-FNA in the diagnosis of solid pancreatic lesions.
- Suction versus slow-pull for endoscopic ultrasound-guided fine-needle aspiration of pancreatic tumors: a prospective randomized trial(2020) CHENG, Spencer; BRUNALDI, Vitor O.; MINATA, Mauricio K.; CHACON, Danielle A.; SILVEIRA, Eduardo B.; MOURA, Diogo T. H. de; SANTOS, Marcos E. L. Dos; MATUGUMA, Sergio E.; CHAVES, Dalton M.; FRANCA, Raony F.; JACOMO, Alfredo L.; ARTIFON, Everson L. A.Background: Suction (S) is commonly used to improve cell acquisition during endoscopic ultrasoundguided fine-needle aspiration (EUS-FNA). Slow-pull (SP) sampling is another technique that might procure good quality specimens with less bloodiness. We aimed to determine if SP improves the diagnostic yield of EUS-FNA of pancreatic masses. Methods: Patients with pancreatic solid masses were randomized to four needle passes with both techniques in an alternate fashion. Sensitivity, specificity, positive, and negative predictive values were calculated. Cellularity and bloodiness of cytological samples were assessed and compared according to the technique. Results: Sensitivity, specificity, and accuracy of suction vs. SP were 95.2% vs. 92.3%; 100% vs. 100; 95.7% vs. 93%, respectively. As to the association of methods, they were 95.6, 100 and 96%, respectively. Positive predictive values for S and SP were 100%. There was no difference in diagnostic yield between S and SP (p = 0.344). Cellularity of samples obtained with SP and Suction were equivalent in both smear evaluation (p = 0.119) and cell-block (0.980). Bloodiness of SP and suction techniques were similar as well. Conclusions: S and SP techniques provide equivalent sensitivity, specificity, and accuracy. Association of methods seems to improve diagnostic yield. Suction does not increase the bloodiness of samples compared to slow-pull.
bookPart Tratamento de Varizes de Fundo Gástrico(2017) LôBO, Maíra Ribeiro de Almeida; CHAVES, Dalton Marques; MOURA, Diogo Turiani Hourneaux de; CHIBA, Eunice Komo; MELO, Jeane Martins; FYLYK, Sonia Nadia- Treatment of high-grade dysplasia and intramucosal carcinoma using radiofrequency ablation or endoscopic mucosal resection(2019) MATOS, Mileine Valente de; PONTE-NETO, Alberto Machado da; MOURA, Diogo Turiani Hourneaux de; MAAHS, Ethan Dwane; CHAVES, Dalton Marques; BABA, Elisa Ryoka; IDE, Edson; SALLUM, Rubens; BERNARDO, Wanderley Marques; MOURA, Eduardo Guimaraes Hourneaux deBACKGROUND The progression of Barrett's esophagus (BE) to early esophageal carcinoma occurs sequentially; the metaplastic epithelium develops from a low-grade dysplasia to a high-grade dysplasia (HGD), resulting in early esophageal carcinoma and, eventually, invasive carcinoma. Endoscopic approaches including resection and ablation can be used in the treatment of this condition. AIM To compare the effectiveness of radiofrequency ablation (RFA) vs endoscopic mucosal resection (EMR) + RFA in the endoscopic treatment of HGD and intramucosal carcinoma. METHODS In accordance with PRISMA guidelines, this systematic review included studies comparing the two endoscopic techniques (EMR + RFA and RFA alone) in the treatment of HGD and intramucosal carcinoma in patients with BE. Our analysis included studies involving adult patients of any age with BE with HGD or intramucosal carcinoma. The studies compared RFA and EMR + RFA methods were included regardless of randomization status. RESULTS The seven studies included in this review represent a total of 1950 patients, with 742 in the EMR + RFA group and 1208 in the RFA alone group. The use of EMR + RFA was significantly more effective in the treatment of HGD [RD 0.35 (0.15, 0.56)] than was the use of RFA alone. The evaluated complications (stenosis, bleeding, and thoracic pain) were not significantly different between the two groups. CONCLUSION Endoscopic resection in combination with RFA is a safe and effective method in the treatment of HGD and intramucosal carcinoma, with higher rates of remission and no significant differences in complication rates when compared to the use of RFA alone.
- ENDOSCOPIC ULTRASOUND IN THE EVALUATION OF UPPER SUBEPITHELIAL LESIONS(2015) CHAVES, Dalton Marques; MEINE, Gilmara Coelho; MOURA, Diogo Turiani Hourneaux de; MATUGUMA, Sergio Eiji; LERA, Marcos Eduardo; ARTIFON, Everson Luiz de Almeida; MOURA, Eduardo Guimarães Hourneaux de; SAKAI, PauloBackgroundEndoscopic ultrasound is considered the best imaging test for the diagnosis and evaluation of subepithelial lesions of the gastrointestinal tract.ObjectiveThe present study aims to describe the endosonographic characteristics of upper gastric subepithelial lesions and our experience using endoscopic ultrasound for evaluation of such lesions.MethodsRetrospective data study of 342 patients who underwent endoscopic ultrasound evaluation of subepithelial lesions.ResultsLesions of the fourth layer were more common in the stomach (63.72%) than in the esophagus (44.68%) and duodenum (29.03%). In stomach, 81.1% of the lesions ≥2 cm, and 96.5% ≥3 cm, were from the fourth layer. Endosonographic signs that could be related to malignant behavior, such as irregular borders, echogenic foci, cystic spaces and/or size greater than 3 cm were identified in 34 (15.81%) lesions at the first endoscopic ultrasound evaluation. Endoscopic ultrasound-fine needle aspiration did the diagnosis in 21 (61.76%) patients who were submitted a puncture. Three (12.0%) lesions of 25 who were submitted to regular endoscopic ultrasound surveillance increased the size.ConclusionStomach is the organ most affected with subepithelial lesions of the gastrointestinal tract and the fourth layer was the most common layer of origin. More than 80% of gastric subepithelial lesions from the fourth layer are ≥2 cm. Endoscopic ultrasound evaluation of subepithelial lesions has been very important for stratification into risk groups and to determine the best management.
- VIDEO CAPSULE ENDOSCOPY VS DOUBLE-BALLOON ENTEROSCOPY IN THE DIAGNOSIS OF SMALL BOWEL BLEEDING: A SYSTEMATIC REVIEW AND META-ANALYSIS(2019) BRITO, Helcio P.; RIBEIRO, Igor B.; MOURA, Diogo T. de; BERNARDO, Wanderlei M.; CHAVES, Dalton; KUGA, Rogerio; MAAHS, Ethan D.; ISHIDA, Robson K.; MOURA, Eduardo T.; MOURA, Eduardo G. de
conferenceObject Eus-Guided Coil Plus Cyanoacrylate Versus Cyanoacrylate Conventional Technique to Treat Gastric Varices: A Prospective Randomized Study(2017) CHAVES, Dalton; LOBO, Maira R. Almeida; MOURA, Diogo T. de; FARIAS, Alberto Q.; LUZ, Gustavo O.; MOURA, Eduardo G. de- Adverse Events and Complications with Intragastric Balloons: a Narrative Review (with Video)(2021) RIBEIRO, Igor Braga; KOTINDA, Ana Paula Samy Tanaka; SANCHEZ-LUNA, Sergio A.; MOURA, Diogo Turiani Hourneaux de; MANCINI, Fabio Catache; SOUZA, Thiago Ferreira de; MATUGUMA, Sergio Eiji; SAKAI, Christiano Makoto; ROCHA, Rodrigo Silva de Paula; LUZ, Gustavo de Oliveira; SANTOS, Marcos Eduardo Lera dos; CHAVES, Dalton Marques; FRANZINI, Tomazo Antonio Prince; MOURA, Eduardo Turiani Hourneaux de; MOURA, Eduardo Guimaraes Hourneaux deIntragastric balloon (IGB) is a minimally invasive and reversible therapy for weight loss with a good efficacy and safety profile. Introduced in the 1980s, IGBs have significantly evolved in the last couple of decades. They mechanically act by decreasing the volume of the stomach and its reservoir capacity, delaying gastric emptying, and increasing satiety leading to a subsequent weight loss. Despite the low rates of complications and mortality associated with IGBs, adverse events and complications still occur and can range from mild to fatal. This review aims to provide an update on the current scientific evidence in regard to complications and adverse effects of the use of the IGB and its treatment. This is the first comprehensive narrative review in the literature dedicated to this subject.
article 8 Citação(ões) na Scopus Primary adenosquamous cell carcinoma of the pancreas: the use of endoscopic ultrasound guided - fine needle aspiration to establish a definitive cytologic diagnosis(2017) HOURNEAUX DE MOURA, Diogo Turiani; CORONEL, Martin; AZEVEDO CHACON, Danielle; TANIGAWA, Ryan; CHAVES, Dalton M.; MATUGUMA, Sérgio E; LERA DOS SANTOS, Marcos E; JUKEMURA, José; HOURNEAUX DE MOURA, Eduardo GuimarãesPancreatic cancer is the second most common malignancy of the gastrointestinal tract in the US, and adenocarcinoma has been identified as the most common type of pancreatic cancer. Different types of pancreatic cancers have been classified: adenocarcinoma, ductal adenosquamous carcinoma, solid pseudopapillary tumors, endocrine neoplasms, acinar cell carcinoma, squamous cell carcinoma, cystic tumors, primary lymphoma of the pancreas, and metastatic lesions of the pancreas. Adenosquamous carcinoma is extremely rare, behave in a very aggressive way and is responsible for the 1 to 4% of the pancreatic exocrine neoplastic lesions. We describe the case of an 82-years-old African American female, presenting to our institution with quantifiable weight loss (12 kg in 3 months), jaundice and abdominal pain. On admission, laboratory tests were obtained: total bilirubin: 11.07 mg/dl with a direct fraction of 10.32 mg/dl. Cross-sectional abdominal CT scan with contrast, showed a lesion localized in the pancreatic head (hypodense on T1, measuring 3.5 x 3.5 x 2.5 cm), with vascular invasion of the portal vein. EUS showed a solid, hypoechoic, not well-defined lesion (measuring 3.98 x 3.80 cm), localized between the head and neck of the pancreas. EUS-FNA was performed with a 22G needle using the fanning technique. The cytological specimens demonstrated components of both squamous carcinoma and adenocarcinoma. The patient underwent ERCP procedure, and biliary drainage was performed with an entirely covered metallic stent placement. After a month from the procedures, the patient died due to the severity of the disease. Endoscopic ultrasound has proven to be the best method to diagnose solid pancreatic lesions, including rare and aggressive type of tumors like primary adenosquamous cell carcinoma that we described in this very interesting case report