Takuji Gotoda

Yuri General Hospital, Honjō, Saitama, Japan

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Publications (189)817.5 Total impact

  • Mizutomo Azuma, Chika Kusano, Takuji Gotoda
    Digestive Endoscopy 12/2014; · 1.61 Impact Factor
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    ABSTRACT: The new developed ultrathin transnasal endoscope, the GIF-XP290N, makes possible a resolving power similar to the GIF-H260 at a distance of 3 mm. In this study, using the GIF-XP290N, we evaluated whether endoscopic diagnosis (discrimination between benign and malignant) of gastric lesions is possible using nonmagnified narrow-band imaging (NBI) endoscopy. The subjects were 255 consecutive patients who underwent screening of the gastrointestinal tract using new ultrathin transnasal endoscopy. Their average age was 65.2 ± 11.4 years. The male-female ratio was 2.5:1. All cases were examined using conventional white-light imaging (WLI) and nonmagnified NBI. When a depressed lesion was detected in the stomach, it was examined using WLI, then NBI close examination (at about 3 mm). We observed the mucosal structure of the lesion using close visualization with NBI. Concerning mucosal structural changes, we looked for a clear demarcation line between the lesion and the surrounding mucosa, and loss, irregularity, or nonuniformity of the lesion mucosal microsurface pattern. A total of 52 depressed lesions were examined. The histological diagnosis was cancer for 8 lesions, and noncancer for 44 lesions. WLI examination yielded a sensitivity of 50.0% (4/8), specificity of 63.6% (28/44), and accuracy 61.5% (32/52). On the other hand, NBI close examination yielded a sensitivity of 87.5% (7/8), specificity of 93.2% (41/44), and accuracy of 92.3% (48/52), significantly higher. NBI close examination using ultrathin transnasal endoscopy enables mucosal diagnosis even without magnification and was considered to be an effective technique for improving endoscopic diagnosis. © 2014 Journal of Gastroenterology and Hepatology Foundation and Wiley Publishing Asia Pty Ltd.
    Journal of Gastroenterology and Hepatology 12/2014; 29 Suppl S4:33-36. · 3.63 Impact Factor
  • Journal of Hepato-Biliary-Pancreatic Sciences. 11/2014;
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    ABSTRACT: Based on the results of several case-control and cohort studies gastrointestinal X-ray (GI X-ray) has been recommended for use in the nationwide screening program for gastric cancer.. Although this was the only effective screening program when almost all of the Japanese population were Helicobacter pylori (H. pylori) positive, there has been concern whether an alternative effective screening system should be established for the future H. pylori-negative generation. We therefore conducted the first randomized controlled trial (RCT) comparing GI X-ray and gastrointestinal endoscopy (GIE) scheduled according to results of serological testing (ST); this was done to determine the potential for an alternative screening method.
    Gastric Cancer 08/2014; · 4.83 Impact Factor
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    ABSTRACT: Epigenetic alterations accumulate in normal-appearing tissues of patients with cancer, producing an epigenetic field defect. Cross-sectional studies show that the degree of the defect may be associated with risk in some types of cancer, especially cancers associated with chronic inflammation.
    Gut 06/2014; · 13.32 Impact Factor
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    ABSTRACT: To evaluate the role of observation of experts performing endoscopic submucosal dissection (ESD) in the acquisition of ESD skills. This prospective study is documenting the learning curve of one Western endoscopist. The study consisted of three periods. In the first period (pre-observation), the trainee performed ESDs in animal models in his home institution in the United States. The second period (observation) consisted of visit to Japan and observation of live ESD cases done by experts. The observation of cases occurred over a 5-wk period. During the third period (post-observation), the trainee performed ESD in animal models in a similar fashion as in the first period. Three animal models were used: live 40-50 kg Yorkshire pig, explanted pig stomach model, and explanted pig rectum model. The outcomes from the ESDs done in the animal models before and after observation of live human cases (main study intervention) were compared. Statistical analysis of the data included: Fisher's exact test to compare distributions of a categorical variable, Wilcoxon rank sum test to compare distributions of a continuous variable between the two groups (pre-observation and post-observation), and Kruskal-Wallis test to evaluate the impact of lesion location and type of model (ex-vivo vs live pig) on lesion removal time. The trainee performed 38 ESDs in animal model (29 pre-observation/9 post-observation). The removal times post-observation were significantly shorter than those pre-observation (32.7 ± 15.0 min vs 63.5 ± 9.8 min, P < 0.001). To minimize the impact of improving physician skill, the 9 lesions post-observation were compared to the last 9 lesions pre-observation and the removal times remained significantly shorter (32.7 ± 15.0 min vs 61.0 ± 7.4 min, P = 0.0011). Regression analysis showed that ESD observation significantly reduced removal time when controlling for the sequence of lesion removal (P = 0.025). Furthermore, it was also noted a trend towards decrease in failure to remove lesions and decrease in complications after the period of observation. This study did not find a significant difference in the time needed to remove lesions in different animal models. This finding could have important implications in designing training programs due to the substantial difference in cost between live animal and explanted organ models. The main limitation of this study is that it reflects the experience of a single endoscopist. Observation of experts performing ESD over short period of time can significantly contribute to the acquisition of ESD skills.
    World Journal of Gastroenterology 04/2014; 20(16):4675-4680. · 2.43 Impact Factor
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    ABSTRACT: Recently, several endoscopists have described the usefulness of the endoscopic ultrasonography (EUS)-guided, single transluminal gateway technique (SGT) using transmural placement of single or multiple plastic stents or metal stents for a pancreatic pseudocyst (PC) and walled-off necrosis (WON). Moreover, the uses of the multiple transluminal gateway technique (MTGT) and single transluminal gateway transcystic multiple drainages (SGTMD) for complicated pancreatic walled-off necrosis have recently been reported. The aim of this study is to evaluate retrospectively the feasibility and efficacy of endotherapy for the treatment of complicated PC and WON cases. Eighty-nine patients with a PC (n = 14) and WON (n = 75) were treated under EUS guidance. In a total of 89 cases using SGT in combination with MTGT or SGTMD, the present study showed a technical success rate of 100 %, a final clinical success rate of 97.8 %, an adverse event during procedure rate of 0 %, an early adverse event rate of 12.4 %, and a mortality rate of 2.2 %. Even complicated WON cases can be treated using combination endotherapies, although a surgical approach as well as a percutaneous approach should be considered in the cases refractory to endoscopic therapies.
    Journal of Gastroenterology 04/2014; · 4.02 Impact Factor
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    ABSTRACT: Propofol sedation for elderly patients during time-consuming endoscopic procedures is controversial. Therefore, we investigated the safety of using propofol in elderly patients during upper gastrointestinal therapeutic endoscopy.
    Gut and liver 04/2014; 9(1). · 1.49 Impact Factor
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    ABSTRACT: Although midazolam is widely used during endoscopic procedures by endoscopists, propofol has been recently favored for its rapid action and metabolism. The aim of this study is to compare the clinical advantages between propofol and midazolam use during screening esophagogastroduodenoscopy (EGD) for gastric cancer and post-procedure management at a medical clinic. One hundred six healthy patients aged 20-69 years requesting sedation for screening EGD from October 2012 to May 2013 at a single clinic in Japan were randomly assigned to propofol (n = 54) or midazolam (n = 52). Medications were given by bolus injection, and the dose was adjusted by body weight. Sedation level and tolerability during EGD and recovery time were assessed. Sedation level and tolerability were evaluated by American Society of Anesthesiologists responsiveness levels and four levels of the gag reflex, respectively. For safety purposes, endoscopists and nurses were trained in administering propofol and an anesthesiologist was on call at all times. No statistically significant differences were found between the two groups in sedation level and patient tolerability. Full recovery time in the propofol group (4.7 min) was significantly shorter than that in the midazolam group (24 min, P < 0.01). Regarding post-procedure management of patients in a medical clinic, propofol use might not necessitate a recovery room and excessive assessment tasks because of rapid recovery time without any prolonged reaction, which causes patient compliance. (Clinical trial registration number: UMIN000009142.).
    Gastric Cancer 04/2014; · 4.83 Impact Factor
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    ABSTRACT: Endoscopic mucosal resection (EMR) of early gastric cancer, which has been proved to be safe and effective and is the established standard of care in Japan, has become increasingly established worldwide in the past decade. Endoscopic submucosal dissection (ESD) is superior to EMR, as it is designed to provide precise pathologic staging and long-term curative therapy based on an en bloc R0 specimen irrespective of the size and/or location of the tumor. However, ESD requires highly skilled and experienced endoscopists. The introduction of ESD to the Western world necessitates collaborations between Eastern and Western endoscopists, pathologists, and surgeons.
    Gastrointestinal endoscopy clinics of North America 04/2014; 24(2):213-233.
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    ABSTRACT: Background and AimTo verify the current status in Japan on endoscopic diagnosis of superficial non-ampullary duodenal epithelial tumors (SNADET) by a multicenter case series through a questionnaire survey.Methods Nine endoscopists and a surgeon responded to a questionnaire on endoscopic diagnosis of SNADET. The subjects of this survey were histologically confirmed SNADET that were endoscopically or surgically resected from 2007 to 2012. This survey collected data of 364 patients with 396 SNADET.ResultsOf the 396 SNADET, 121 were histologically diagnosed as low-grade dysplasia (LGD), 112 as high-grade dysplasia (HGD), and 163 as superficial adenocarcinoma (SAC) including 153 mucosal carcinomas and 10 submucosal carcinomas. Total number of SNADET increased from 125 in the first half to 271 in the second half of the survey period. Compared to LGD, a significantly greater number of HGD or SAC was found in the tumors having a diameter >5 mm as well as solitary or predominantly red color. Preoperative endoscopic diagnosis indicated significantly higher sensitivity and accuracy and significantly lower specificity for HGD or SAC of final histology than preoperative biopsy. Ten submucosal carcinomas had 0-I or 0-IIa+IIc macroscopic-type tumors with red color.Conclusions This multicenter case series study suggested that the number of resected SNADET is dramatically increasing in Japan. Tumor diameter >5 mm and red color seemed to be signs for tumors of HGD or SAC. Preoperative endoscopy may provide a more reliable diagnosis of final histology of HGD or SAC than preoperative biopsy. Further studies are warranted for establishing endoscopic features of submucosal carcinoma.
    Digestive Endoscopy 04/2014; 26(S2). · 1.61 Impact Factor
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    ABSTRACT: Endoscopic resection of early gastric cancer (EGC) has proven safety and efficacy, and is the established standard of care in Japan. In the past decade, it is increasingly established worldwide. The endoscopic submucosal dissection (ESD) is superior to endoscopic mucosal resection (EMR) technique as it is designed to provide adequate staging and long-term curative therapy-based on the en bloc R0 specimen irrespective of the size and/or location of the tumor coupled with the reliable pathological specimen. However, ESD is still requiring skilled and experienced endoscopist to perform because of complex procedures, higher complication and causing long-time consuming. The learning and application of these relatively complex endoscopic techniques for EGC has been shown across the world. Thus, a standardized ESD training system is urgently needed to disseminate safe and effective ESD technique to practices with limited ESD experience. In recent years, several innovations providing solutions to easier and safer performance of ESD have emerged. Those increase control of surgical effectors manipulating the target tissue, and enhance performance in complex surgical tasks. Very recently, the use of the laparoscopic and endoscopic cooperative surgery (LECS) procedure is indicated for EGC that would be difficult to treat with ESD. As an ultimate gastric cancer endotherapy with a reasonable surgical time, LECS might be promising method at this stage. The indications for LECS for EGC could be expanded in the future, which could result in increasingly successful gastric cancer treatment.
    Annals of translational medicine. 03/2014; 2(3):25.
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    ABSTRACT: To investigate the risk factors for delayed bleeding following endoscopic submucosal dissection (ESD) treatment for colorectal neoplasms. We retrospectively reviewed the medical records of 317 consecutive patients with 325 lesions who underwent ESD for superficial colorectal neoplasms at our hospital from January 2009 to June 2013. Delayed post-ESD bleeding was defined as bleeding that resulted in overt hematochezia 6 h to 30 d after ESD and the observation of bleeding spots as confirmed by repeat colonoscopy or a required blood transfusion. We analyzed the relationship between risk factors for delayed bleeding following ESD and the following factors using univariate and multivariate analyses: age, gender, presence of comorbidities, use of antithrombotic drugs, use of intravenous heparin, resected specimen size, lesion size, lesion location, lesion morphology, lesion histology, the device used, procedure time, and the presence of significant bleeding during ESD. Delayed post-ESD bleeding was found in 14 lesions from 14 patients (4.3% of all specimens, 4.4% patients). Patients with episodes of delayed post-ESD bleeding had a mean hemoglobin decrease of 2.35 g/dL. All episodes were treated successfully using endoscopic hemostatic clips. Emergency surgery was not required in any of the cases. Blood transfusion was needed in 1 patient (0.3%). Univariate analysis revealed that lesions located in the cecum (P = 0.012) and the presence of significant bleeding during ESD (P = 0.024) were significantly associated with delayed post-ESD bleeding. The risk of delayed bleeding was higher for larger lesion sizes, but this trend was not statistically significant. Multivariate analysis revealed that lesions located in the cecum (OR = 7.26, 95%CI: 1.99-26.55, P = 0.003) and the presence of significant bleeding during ESD (OR = 16.41, 95%CI: 2.60-103.68, P = 0.003) were independent risk factors for delayed post-ESD bleeding. Location in the cecum and significant bleeding during ESD predispose patients to delayed post-procedural bleeding. Therefore, careful and additional management is recommended for these patients.
    World Journal of Gastroenterology 02/2014; 20(7):1839-45. · 2.43 Impact Factor
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    ABSTRACT: Curative treatment of patients with gastric cancer requires reliable detection of early gastric cancer. Magnifying endoscopy with narrow-band imaging (M-NBI) is useful for the accurate preoperative diagnosis of early gastric cancer. However, the role of M-NBI in screening endoscopy has not been established. The aims of this study were to determine the feasibility and limitations of M-NBI in screening endoscopy. We conducted a multicenter prospective uncontrolled trial of patients undergoing routine screening endoscopy patients. We determined the diagnostic accuracy, sensitivity and specificity of M-NBI according to the degree of certainty and need for biopsy, as assessed using the VS (vessel plus surface) classification system. We analyzed the endoscopic and histopathological characteristics of both false negative and false positive high confidence M-NBI diagnoses. We then developed a provisional diagnostic strategy based on the diagnostic performance and limitations identified in this study. A total of 1097 patients were enrolled in the study. We analyzed 371 detected lesions (20 cancers and 351 non-cancers). The accuracy, sensitivity and specificity of high confidence M-NBI diagnoses were 98.1, 85.7 and 99.4 %, respectively. The false negative case was a pale mucosal lesion with tissue diagnosis of signet-ring cell carcinoma. Exclusion of pale mucosal lesions increased the accuracy, sensitivity and specificity of high confidence M-NBI diagnoses to 99.4, 100 and 99.4 %, respectively. We therefore propose a practical strategy targeting non-pale mucosal lesions. With a refined strategy considering its limitations, M-NBI can act as an "optical biopsy" in screening endoscopies.
    Gastric Cancer 01/2014; · 4.83 Impact Factor
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    ABSTRACT: The 2005 Japan Gastroenterological Endoscopy Society (JGES) guidelines for the management of antithrombotic drugs focused on the increasing risks of bleeding, even from biopsy during scheduled esophagogastroduodenoscopy (EGD). The new 2012 guidelines emphasized the prevention of thromboembolic complications. To compare with the new guidelines, we investigated the clinical management of EGD by clinicians under the former JGES guidelines for patients taking antithrombotic agents. Medical records of 4574 patients (mean age 63.4 years, range 3-96 years, male/female ratio 2805/1769) who underwent scheduled EGD from April 2011 to March 2012 were reviewed retrospectively. The prescribed agents, pre-existing comorbidities, drug cessation before EGD, bleeding, and thromboembolic complications were investigated. Five hundred forty-six patients (12.0 %) were taking antithrombotic drugs (aspirin, 313; warfarin, 134; cilostazol, 57; clopidogrel, 59; ethylicosapentate, 40; prostaglandin preparations, 41; ticlopidine, 29; icosapentate, 24; dipyridamole, 4); 116 and 29 patients, respectively, were managed with a combination of 2 or 3 agents. Among 490 patients whose medical records were precisely documented, 40.6 % underwent EGD without cessation. Bleeding and thromboembolic complications were not observed. The most common pre-existing comorbidity was ischemic heart disease (27.9 %), followed by carotid or intracranial large artery atherosclerosis (20.5 %), cerebral infarction or transient ischemic attack (20.3 %), and atrial fibrillation (15.9 %). Patients with pre-existing comorbidity requiring anticoagulants frequently underwent EGD without cessation. We revealed the low impact of the 2005 JGES guidelines on the management of antithrombotic drugs. Our physicians have reasonably decided to continue antithrombotic drugs before EGD according to the risk of thromboembolism.
    Gastric Cancer 01/2014; · 4.83 Impact Factor
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    ABSTRACT: Propofol is rapidly increasing in use in many countries because endoscopists and patients report greater satisfaction with propofol than with conventional sedatives. However, propofol infusion during lengthy endoscopic procedures in elderly patients is still controversial. We investigated the safety of gastroenterologist-guided propofol sedation in elderly patients who underwent gastric endoscopic submucosal dissection (ESD) at a single center. We reviewed 121 medical records of patients who underwent gastric ESD. We compared retrospectively the details of propofol usage, hemodynamics, and re-sedation in the elderly group to those in a younger group. No significant differences in patients' baseline characteristic including ASA classification between elderly and younger groups were shown. The average maintenance dose and total dose of propofol infusion could be similarly administrated in both groups. Seven adverse events (5.8 %) occurred at the time of propofol bolus injection. Although 3 cases (2.5 %) of hypotension (systolic blood pressure <80 mmHg), 8 cases (6.6 %) of desaturation (blood oxygen saturation <90 %) and 1 case (0.8 %) of bradycardia (pulse rate <40) were found during the maintenance of propofol infusion, there were no statistically significant differences in the elderly and younger groups. All events were immediately resolved without any intervention. No patients developed a re-sedated condition. Gastroenterologist-guided propofol sedation during gastric ESD may be acceptable even in the elderly with ASA classification I/II under careful monitoring of vital signs and oxygen saturation.
    Gastric Cancer 01/2014; · 4.83 Impact Factor
  • Health Evaluation and Promotion. 01/2014; 41(2):303-307.
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    ABSTRACT: Endoscopic submucosal dissection (ESD) has been employed for removal of early neoplastic gastrointestinal lesions and has well-documented higher en bloc and curative resection rates compared with endoscopic mucosal resection. Based on these advantages, ESD has gained widespread use in Asia but unfortunately not in the West. The main obstacles remain the very flat learning curve and lack of training resources. In Asia, ESD skills are acquired in the time-honored mentor/apprentice model over a period of few years. This algorithm cannot be directly applied in the West due to substantial differences. Can we train Western endoscopists in ESD in a model that bridges the gap between the traditional approach that requires years to gain proficiency and the weekend crash course approach that does not do justice to our patients? We propose a training algorithm that would guide the ESD training of Western endoscopists in a way to reliably deliver high-quality end product.
    Expert review of gastroenterology & hepatology 12/2013;
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    ABSTRACT: Surgical gastrojejunostomy is associated with relatively high morbidity and mortality rates. However, current experimental EUS-guided gastrojejunostomy information is limited. To evaluate a novel EUS-guided gastrojejunostomy technique using a new enteric balloon and lumen-apposing metal stent. Animal experiment. Animal laboratory at a referral center. In 5 pigs, gastrojejunostomies were created under EUS guidance. Fully covered lumen-apposing stents were placed between the stomach and the jejunum. Technical success and adverse events of EUS-guided gastrojejunostomy. All stents, with 1 exception, were successfully deployed without any adverse events. The mean time to stent placement was 44.2 minutes (range 28-64 minutes). All animals showed normal eating behavior without signs of infection for 1 month after the procedure. Endoscopic imaging of the stomach site showed the stent to be patent and stable, without dislodgment, in all of the pigs. Necropsy showed complete adhesion between the stomach and the jejunum wall. Pilot study. Creation of an EUS-guided gastrojejunostomy by using a novel enteric balloon and metal stent appears to be promising as a minimally invasive treatment.
    Gastrointestinal endoscopy 12/2013; 78(6):934-9. · 4.90 Impact Factor
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    ABSTRACT: Background and study aim: Endoscopic resection has been favored for the management of intramucosal adenocarcinoma of the esophagogastric junction (AEGJ) over standard treatment with surgical resection. Several previous studies have reported only short-term outcomes. The aim of the present study was to report the long-term follow-up and outcomes of endoscopic submucosal dissection (ESD), a representative endoscopic resection method, for the management of superficial AEGJ. Patients and methods: A retrospective cohort study included 53 consecutive patients with superficial AEGJ who underwent ESD between 2001 and 2007 at the National Cancer Center Hospital, Tokyo, Japan. Rates of overall survival, recurrence-free survival, and cause-specific survival of patients with AEGJ after endoscopic resection were analyzed. Results: The 5-year overall, recurrence-free, and cause-specific survival rates in the 53 patients were 94.2 %, 92.3 % and 96.1 %, respectively. The median follow-up was 6.1 years. En bloc, R0, and curative resection rates were 100 %, 79 %, 68 %, respectively. In 36 patients with curative resection, the cause-specific survival rate was 100 % and no recurrence or metastases were detected. In 17 patients with non-curative resection, recurrence was found in three patients (17 %); two of the three patients died of their disease whilst one patient received chemotherapy. Conclusions: Superficial AEGJ can be well controlled by ESD when curative resection is achieved.
    Endoscopy 12/2013; 45(12):992-6. · 5.20 Impact Factor

Publication Stats

6k Citations
817.50 Total Impact Points


  • 2014
    • Yuri General Hospital
      Honjō, Saitama, Japan
  • 2007–2014
    • Tokyo Medical University
      • Department of Gastroenterology and Hepatology
      Edo, Tōkyō, Japan
  • 1997–2013
    • National Cancer Center
      • Endoscopy Division
      Edo, Tōkyō, Japan
  • 2010–2012
    • National Center for Global Health and Medicine in Japan
      • Department of Gastroenterology
      Edo, Tōkyō, Japan
    • Portsmouth Hospitals NHS Trust
      Portsmouth, England, United Kingdom
    • Changi General Hospital
      • Department of Gastroenterology
      Singapore, Singapore
  • 2007–2010
    • Sapienza University of Rome
      • Department of General Surgery, Surgical Specialities and Organ Transplantation "Paride Stefanini"
      Roma, Latium, Italy
  • 2009
    • University of Missouri
      Columbia, Missouri, United States
  • 2005–2009
    • Stanford University
      • Division of Gastroenterology
      Palo Alto, California, United States
  • 2008
    • Jichi Medical University
      • Division of Gastroenterology
      Totigi, Tochigi, Japan
  • 2002–2008
    • The University of Tokyo
      • • Department of Internal Medicine
      • • Department of Gastroenterology
      Tokyo, Tokyo-to, Japan
  • 2004
    • Tonan Hospital
      Kôti, Kōchi, Japan
  • 1999
    • National Hospital Organization Kyushu Cancer Center
      Hukuoka, Fukuoka, Japan