SPENCER CHENG

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LIM/26 - Laboratório de Pesquisa em Cirurgia Experimental, Hospital das Clínicas, Faculdade de Medicina

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  • article 24 Citação(ões) na Scopus
    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 de
    Our 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.
  • article
    Anti-reflux versus conventional self-expanding metal stents in the palliation of esophageal cancer: A systematic review and meta-analysis
    (2022) SASSO, Joao Guilherme Ribeiro Jordao; MOURA, Diogo Turiani Hourneaux de; PROENCA, Igor Mendonca; MONTE JUNIOR, Epifanio Silvino do; RIBEIRO, Igor Braga; SANCHEZ-LUNA, Sergio A.; CHENG, Spencer; BESTETTI, Alexandre Moraes; KUM, Angelo So Taa; BERNARDO, Wanderley Marques; MOURA, Eduardo Guimaraes Hourneaux de
    Background and study aims Self-expanding metal stents (SEMS) are an effective palliative endoscopic therapy to reduce dysphagia in esophageal cancer. Gastroesophageal reflux disease (GERD) is a relatively common complaint after non-valved conventional SEMS placement. Therefore, valved self-expanding metal stents (SEMS-V) were designed to reduce the rate of GERD symptoms. We aimed to perform a systematic review and meta-analysis comparing the two stents. Material and methods This was a systematic review and meta-analysis including only randomized clinical trials (RCT) comparing the outcomes between SEMS-V and non-valved self-expanding metal stents (SEMS-NV) following the Preferred Reporting Items for Systematic Reviews and Meta-analysis guidelines. The risk of bias was assessed using the Cochrane Risk of Bias 2 tool. Data were analyzed with Review Manager Software. Quality of evidence was evaluated using Grading of Recommendations Assessment, Development, and Evaluation guidelines. Results Ten randomized clinical trials including a total of 467 patients, 234 in the SEMS-V group and 233 in the SEMS-NV group, were included. There were no statistically significant differences regarding GERD qualitative analysis (RD -0.17; 95% CI -0.67, 0.33; P= 0.5) and quantitative analysis (SMD -0.22; 95% CI -0.53, 0.08; P=0.15) technical success (RD -0.03; 95% CI -0.07, 0.01; P= 0.16), dysphagia improvement (RD -0.07; 95% CI -0.19, 0.06; P=0.30), and adverse events (RD 0.07; 95% CI -0.07, 0.20; P= 0.32). Conclusions Both SEMS-V and SEMS-NV are safe and effective in the palliation of esophageal cancer with similar rates of GERD, dysphagia relief, technical success, adverse events, stent migration, stent obstruction, bleeding, and improvement of the quality of life.
  • article 8 Citação(ões) na Scopus
    Pancreatitis after endoscopic retrograde cholangiopancreatography: A narrative review
    (2021) RIBEIRO, Igor Braga; MONTE JUNIOR, Epifanio Silvino do; MIRANDA NETO, Antonio Afonso; PROENCA, Igor Mendonca; MOURA, Diogo Turiani Hourneaux de; MINATA, Mauricio Kazuyoshi; IDE, Edson; SANTOS, Marcos Eduardo Lera dos; LUZ, Gustavo de Oliveira; MATUGUMA, Sergio Eiji; CHENG, Spencer; BARACAT, Renato; MOURA, Eduardo Guimaraes Hourneaux de
    Acute post-endoscopic retrograde cholangiopancreatography pancreatitis (PEP) is a feared and potentially fatal complication that can be as high as up to 30% in high-risk patients. Pre-examination measures, during the examination and after the examination are the key to technical and clinical success with a decrease in adverse events. Several studies have debated on the subject, however, numerous topics remain controversial, such as the effectiveness of prophylactic medications and the amylase dosage time. This review was designed to provide an update on the current scientific evidence regarding PEP available in the literature.
  • article 37 Citação(ões) na Scopus
    Prevention of esophageal stricture after endoscopic submucosal dissection: a systematic review and meta-analysis
    (2016) OLIVEIRA, J. F.; MOURA, E. G. H.; BERNARDO, W. M.; IDE, E.; CHENG, S.; SULBARAN, M.; SANTOS, C. M. L.; SAKAI, P.
    Endoscopic submucosal dissection (ESD) of extensive superficial cancers of the esophagus may progress with high rates of postoperative stenosis, resulting in significantly decreased quality of life. Several therapies are performed to prevent this, but have not yet been compared in a systematic review. A systematic review of the literature and meta-analysis were performed using the MEDLINE, Embase, Cochrane, LILACS, Scopus, and CINAHL databases. Clinical trials and observational studies were searched from March 2014 to February 2015. Search terms included: endoscopy, ESD, esophageal stenosis, and esophageal stricture. Three retrospective and four prospective (three randomized) cohort studies were selected and involved 249 patients with superficial esophageal neoplasia who underwent ESD, at least two-thirds of the circumference. We grouped trials comparing different techniques to prevent esophagus stenosis post-ESD. We conducted different meta-analyses on randomized clinical trials (RCT), non-RCT, and global analysis. In RCT (three studies, n = 85), the preventive therapy decreased the risk of stenosis (risk difference = -0.36, 95 % CI -0.55 to -0.18, P = 0.0001). Two studies (one randomized and one non-randomized, n = 55) showed that preventative therapy lowered the average number of endoscopy dilatations (mean difference = -8.57, 95 % CI -13.88 to -3.25, P < 0.002). There were no significant differences in the three RCT studies (n = 85) in complication rates between patients with preventative therapy and those without (risk difference = 0.02, 95 % CI -0.09 to 0.14, P = 0.68). The use of preventive therapy after extensive ESD of the esophagus reduces the risk of stenosis and the number of endoscopic dilatations for resolution of stenosis without increasing the number of complications.
  • article 4 Citação(ões) na Scopus
    Role of pancreatography in the endoscopic management of encapsulated pancreatic collections - review and new proposed classification
    (2020) PROENCA, Igor Mendonca; SANTOS, Marcos Eduardo Lera dos; MOURA, Diogo Turiani Hourneaux de; RIBEIRO, Igor Braga; MATUGUMA, Sergio Eiji; CHENG, Spencer; MCCARTY, Thomas R.; MONTE JUNIOR, Epifanio Silvino do; SAKAI, Paulo; MOURA, Eduardo Guimaraes Hourneaux de
    Pancreatic fluids collections are local complications related to acute or chronic pancreatitis and may require intervention when symptomatic and/or complicated. Within the last decade, endoscopic management of these collections via endoscopic ultrasound-guided transmural drainage has become the gold standard treatment for encapsulated pancreatic collections with high clinical success and lower morbidity compared to traditional surgery and percutaneous drainage. Proper understanding of anatomic landmarks, including assessment of the main pancreatic duct and any associated lesions - such as disruptions and strictures - are key to achieving clinical success, reducing the need for reintervention or recurrence, especially in cases with suspected disconnected pancreatic duct syndrome. Additionally, proper review of imaging and anatomic landmarks, including collection location, are pivotal to determine type and size of pancreatic stenting as well as approach using long-term transmural indwelling plastic stents. Pancreatography to adequately assess the main pancreatic duct may be performed by two methods: Either non-invasively using magnetic resonance cholangiopancreatography or endoscopically via retrograde cholangiopan-creatography. Despite the critical need to understand anatomy via pancrea-tography and assess the main pancreatic duct, a standardized approach or uniform assessment strategy has not been described in the literature. Therefore, the aim of this review was to clarify the role of pancreatography in the endoscopic management of encapsulated pancreatic collections and to propose a new classification system to aid in proper assessment and endoscopic treatment.
  • article
    Stents and surgical interventions in the palliation of gastric outlet obstruction: a systematic review
    (2016) MINATA, Mauricio Kazuyoshi; BERNARDO, Wanderley Marques; ROCHA, Rodrigo Silva de Paula; MORITA, Flavio Hiroshi Ananias; AQUINO, Julio Cesar Martins; CHENG, Spencer; ZILBERSTEIN, Bruno; SAKAI, Paulo; MOURA, Eduardo Guimaraes Hourneaux de
    Background and study aims: Palliative treatment of gastric outlet obstruction can be done with surgical or endoscopic techniques. This systematic review aims to compare surgery and covered and uncovered stent treatments for gastric outlet obstruction (GOO). Patients and methods: Randomized clinical trials were identified in MEDLINE, Embase, Cochrane, LILACs, BVS, SCOPUS and CINAHL databases. Comparison of covered and uncovered stents included: technical success, clinical success, complications, obstruction, migration, bleeding, perforation, stent fracture and reintervention. The outcomes used to compare surgery and stents were technical success, complications, and reintervention. Patency rate could not be included because of lack of uniformity of the extracted data. Results: Eight studies were selected, 3 comparing surgery and stents and 5 comparing covered and uncovered stents.The meta-analysis of surgical and endoscopic stent treatment showed no difference in the technical success and overall number of complications. Stents had higher reintervention rates than surgery (RD: 0.26, 95% CI [0.05, 0.47], NNH: 4). There is no significant difference in technical success, clinical success, complications, stent fractures, perforation, bleeding and the need for reintervention in the analyses of covered and uncovered stents. There is a higher migration rate in the covered stent therapy compared to uncovered self-expanding metallic stents (SEMS) in the palliation of malignant GOO (RD: 0.09, 95% CI [0.04, 0.14], NNH: 11). Nevertheless, covered stents had lower obstruction rates (RD: -0.21, 95% CI [-0.27,-0.15], NNT: 5). Conclusions: In the palliation of malignant GOO, covered SEMS had higher migration and lower obstruction rates when compared with uncovered stents. Surgery is associated with lower reintervention rates than stents.
  • article
    Endoscopic ultrasound-guided vs endoscopic retrograde cholangiopancreatography biliary drainage for obstructed distal malignant biliary strictures: A systematic review and meta-analysis
    (2019) LOGIUDICE, Fernanda P.; BERNARDO, Wanderlei M.; GALETTI, Facundo; SAGAE, Vitor M.; MATSUBAYASHI, Carolina O.; MADRUGA NETO, Antonio C.; BRUNALDI, Vitor O.; MOURA, Diogo T. H. de; FRANZINI, Tomazo; CHENG, Spencer; MATUGUMA, Sergio E.; MOURA, Eduardo G. H. de
    BACKGROUND For palliation of malignant biliary obstruction (MBO), the gold-standard method of biliary drainage is endoscopic retrograde cholangiopancreatography (ERCP) with the placement of metallic stents. Endoscopic ultrasound (EUS)-guided drainage is an alternative that is typically reserved for cases of ERCP failure. Recently, however, there have been robust randomized clinical trials (RCTs) comparing EUS-guided drainage and ERCP as primary approaches to MBO. AIM To compare EUS guidance and ERCP in terms of their effectiveness and safety in palliative biliary drainage for MBO. METHODS This was a systematic review and meta-analysis, in which we searched the MEDLINE, Excerpta Medica, and Cochrane Central Register of Controlled Trials databases. Only RCTs comparing EUS and ERCP for primary drainage of MBO were eligible. All of the studies selected provided data regarding the rates of technical and clinical success, as well as the duration of the procedure, adverse events, and stent patency. We assessed the risk of biases using the Jadad score and the quality of evidence using the Grading of Recommendations Assessment, Development and Evaluation criteria. RESULTS The database searches yielded 5920 records, from which we selected 3 RCTs involving a total of 222 patients (112 submitted to EUS and 110 submitted to ERCP). In the EUS and ERCP groups, the rate of technical success was 91.96% and 91.81%, respectively, with a risk difference (RD) of 0.00% (95% CI: -0.07, 0.07; P = 0.97; I-2 = 0%). The clinical success was 84.81% and 85.53% in the EUS and ERCP groups, respectively, with an RD of -0.01% (95% CI: -0.12, 0.10; P = 0.90; I-2 = 0%). The mean difference (MD) for the duration of the procedure was -0.12% (95% CI: -8.20, 7.97; P = 0.98; I-2 = 84%). In the EUS and ERCP groups, there were 14 and 25 adverse events, respectively, with an RD of -0.06% (95% CI: -0.23, 0.12; P = 0.54; I-2 = 77%). The MD for stent patency was 9.32% (95% CI: -4.53, 23.18; P = 0.19; I-2 = 44%). The stent dysfunction rate was significantly lower in the EUS group (MD = -0.22%; 95CI:-0.35, -0.08; P = 0.001; I-2 = 0%). CONCLUSION EUS represents an interesting alternative to ERCP for MBO drainage, demonstrating lower stent dysfunction rates compared with ERCP. Technical and clinical success, duration, adverse events and patency rates were similar.