Feasibility of laparoscopic endoscopic cooperative surgery for non-ampullary superficial duodenal neoplasms: Single-arm confirmatory trial

Feasibility of modified double-layered suturing for a large mucosal defect after duodenal endoscopic submucosal dissection (origami method)

A modified double-layered suturing procedure (origami method; OGM) can achieve robust closure, even for large mucosal defects, by folding the muscle layer using through-the-scope clips. This study aimed to evaluate the feasibility of OGM in duodenal endoscopic submucosal dissection (ESD).This retrospective, observational study was conducted at a tertiary care hospital. We reviewed cases of OGM attempted after duodenal ESD between June 2022 and April 2023. We excluded lesions located in the duodenal bulb or involving the major papilla. We measured the clinical characteristics and outcomes.OGM was attempted in 28 cases after duodenal ESD. The median mucosal defect size was 38 mm (range 26-110). Complete closure was achieved in 27 cases (96%), including the largest lesion. The median closure time was 16 minutes. There were no perforations caused by clips. Delayed perforation and bleeding were not observed. Among 28 cases, 21 underwent follow-up endoscopy 3-5 days after ESD, and the muscle layer remained folded in all cases.OGM achieved a high rate of complete closure even after duodenal ESD. Closure with OGM was robust enough to maintain the folded muscle layer for at least 3 days postoperatively.

Treatment strategy and clinical outcomes of thoracoscopic endoscopic cooperative surgery for submucosal tumors in the esophagus

PURPOSE

Recently, submucosal tumors (SMTs) of the esophagus have been treated with peroral endoscopic tumor resection (POET) and a new procedure called thoracoscopic endoscopic cooperative surgery (TECS). This study aimed to validate the treatment strategy for SMTs and determine whether or not TECS is a viable option when POET is not feasible.

METHODS

POET and TECS were performed in 12 patients between February 2020 and January 2024. The clinical characteristics and perioperative outcomes were retrospectively evaluated.

RESULTS

Six patients were included in each group, with most of the tumors located in the middle thoracic esophagus (75%). The general anesthesia duration was significantly longer in the TECS group than in the POET group (P < 0.001), but no significant differences in endoscopic procedure time, tumor mass index, oral intake date, or length of hospital stay were observed between the two groups. En bloc and R0 resections were performed in all patients. One patient in the TECS group experienced a Clavien-Dindo grade 3a adverse event, and no tumor recurrence occurred during the median follow-up period of 33 (range, 6-53) months.

CONCLUSION

TECS is a safe and feasible option for SMTs when POET is difficult to perform.

A first-in-human clinical study of laparoscopic autologous myoblast sheet transplantation to prevent delayed perforation after duodenal endoscopic mucosal dissection

BACKGROUND

The detection rate of superficial non-ampullary duodenal epithelial tumors (SNADETs) has recently been increasing. Large tumors may contain malignant lesions and early therapeutic intervention is recommended. Endoscopic mucosal dissection (ESD) is considered a feasible treatment modality, however, the anatomical and physiological characteristics of the duodenum create a risk of postoperative perforation after ESD.

METHODS

To explore whether myoblast sheet transplantation could prevent delayed perforation after ESD, a first-in-human (FIH) clinical trial of laparoscopic autologous myoblast sheet transplantation after duodenal ESD was launched. Autologous myoblast sheets fabricated from muscle tissue obtained seven weeks before ESD were transplanted laparoscopically onto the serous side of the ESD. The primary endpoints were the onset of peritonitis due to delayed perforation within three days after surgery and all adverse events during the follow-up period.

RESULTS

Three patients with SNADETs ≥ 20 mm in size underwent transplantation of a myoblast sheet onto the serous side of the duodenum after ESD. In case 1, The patient's postoperative course was uneventful. Endoscopy and abdominal computed tomography revealed no signs of delayed perforation. Despite incomplete mucosal closure in case 2, and multiple micro perforations during ESD in case 3, cell sheet transplantation could prevent the postoperative massive perforation after ESD, and endoscopy on day 49 after transplantation revealed no stenosis.

CONCLUSIONS

This clinical trial showed the safety, efficacy, and procedural operability of this novel regenerative medicine approach involving transplanting an autologous myoblast sheet laparoscopically onto the serosa after ESD in cases with a high risk of delayed perforation. This result indicates the potential application of cell sheet medicine in treating various abdominal organs and conditions with minimal invasiveness in the future.

TRIAL REGISTRATION

jRCT, jRCT2073210094. Registered November 8 2021, https://jrct.niph.go.jp/latest-detail/jRCT2073210094 .

Short- and long-term outcomes of endoscopic submucosal dissection and laparoscopic and endoscopic cooperative surgery for superficial non-ampullary duodenal epithelial tumors

BACKGROUND AND AIMS

This retrospective study aimed to compare the short- and long-term outcomes of endoscopic submucosal dissection and laparoscopic and endoscopic cooperative surgery in patients with superficial non-ampullary duodenal epithelial tumors.

PATIENTS AND METHODS

We investigated consecutive patients with SNADETs > 10 mm in size who underwent ESD (ESD group) or LECS (LECS group) between January 2015 and March 2021. The data was used to analyze the clinical course, management, survival status, and recurrence between the two groups.

RESULTS

A total of 113 patients (100 and 13 in the ESD and LECS groups, respectively) were investigated. The rates of en bloc resection and curative resection were 100% vs. 100% and 93.0% vs. 77.0% in the ESD and LECS groups, respectively, with no significant difference. The ESD group had shorter resection and suturing times than the LECS group, but there were no significant difference after propensity score matching. There were also no differences in the rates of postoperative adverse event (7.0% vs. 23.1%; P = 0.161). The 3-year overall survival (OS) rate was high in both the ESD and LECS groups (97.6% vs. 100%; P = 0.334). One patient in the ESD group experienced recurrence due to liver metastasis; however, no deaths related to SNADETs were observed.

CONCLUSION

ESD and LECS are both acceptable treatments for SNADETs in terms of a high OS rate and a low long-term recurrence rate, thereby achieving a comparable high rate of curative resection. Further studies are necessary to compare the outcomes of ESD and LECS for SNADETs once both techniques are developed further.

Partial duodenectomy with seromyotomy by the "lift-and-cut" method for superficial nonampullary duodenal epithelial tumors: A novel technique

INTRODUCTION

The therapeutic strategy for superficial nonampullary duodenal epithelial tumors remains controversial. We developed a novel surgical technique for superficial nonampullary duodenal epithelial tumors. We report the initial two cases managed with this method.

MATERIALS AND SURGICAL TECHNIQUE

We endoscopically confirmed the tumor location and circumferentially incised the seromuscular layer of the duodenum along it. After circumferential seromyotomy, the submucosal layer was expanded by endoscopic insufflation, and the target lesion was sufficiently lifted. The submucosal layer, including the target lesion, was stapled and resected after confirming the absence of problems with endoscopic passage. The seromuscular layer was continuously sutured to bury and reinforce the stapler line. Single-incision laparoscopic surgery was performed in one case. The resected specimens measured 52 × 32 mm and 50 × 26 mm with negative surgical margins. Both patients were discharged without complications and demonstrated no evidence of stenosis.

DISCUSSION

Compared with previously reported procedures, this method of partial duodenectomy with seromyotomy for superficial nonampullary duodenal epithelial tumors is promising, simple, and safe.

Laparoscopic Endoscopic Cooperative Surgery Using Open-Window Suturing Technique for Treating Non-ampullary Superficial Duodenal Neoplasms Located on the Pancreatic Side

PURPOSE

No study has focused on the safety and feasibility of our previously developed open-window suturing technique to close mucosal defects on the pancreatic side after endoscopic submucosal dissection from the opened duodenal wall. This study aimed to evaluate the safety and usefulness of laparoscopic endoscopic cooperative surgery for duodenal tumors for treating superficial non-ampullary duodenal epithelial tumors on the pancreatic side of the duodenum.

METHODS

This retrospective study included 61 consecutive patients who underwent surgery during August 2014-November 2021. After dissection when the tumor was on the pancreatic side, we sutured the mucosal defect from the opened duodenal wall. A preoperative endoscopic pancreatic stent was placed for tumors within 1 cm of the ampulla of Vater. The surgical outcomes were compared between tumors on the pancreatic and non-pancreatic sides.

RESULTS

There were 27 and 34 patients with tumors on the pancreatic and non-pancreatic sides, respectively. The patient characteristics were similar. Preoperative pancreatic stents were placed in four patients in the pancreatic side group. The median operative time was significantly longer on the pancreatic side than in the non-pancreatic side group (241 vs. 209 min, P = 0.02). In one patient in the pancreatic side group, an intraoperative injury of the ampulla of Vater was successfully treated with intraoperative management. There were no significant differences in the incidence of postoperative grade II or higher complications between the groups.

CONCLUSIONS

Laparoscopic endoscopic cooperative surgery for duodenal tumors for treating superficial non-ampullary duodenal epithelial tumors on the pancreatic side is safe and feasible.

Issues and Prospects of Current Endoscopic Treatment Strategy for Superficial Non-Ampullary Duodenal Epithelial Tumors

An increasing number of duodenal tumors are being diagnosed over the years, leading to increased confusion regarding the choice of treatment options. Small-to-large tumors and histological types vary from adenoma to carcinoma, and treatment methods may need to be selected according to lesion characteristics. Because of its anatomic characteristics, complications are more likely to occur in the duodenum than in other gastrointestinal organs. Several reports have described the outcomes of conventional endoscopic mucosal resection, endoscopic submucosal dissection, cold snare polypectomy, underwater endoscopic mucosal resection, endoscopic full-thickness resection, and laparoscopic and endoscopic cooperative surgery for duodenal tumors. However, even in the guidelines set out by various countries, only the treatment methods are listed, and no clear treatment strategies are provided. Although there are few reports with a sufficiently high level of evidence, considering the currently available treatment options is essential. In this report, we reviewed previous reports on each treatment strategy, discussed the current issues and prospects, and proposed the best possible treatment strategy.

Clinicopathological features and management strategy for superficial nonampullary duodenal tumors: a multi-center retrospective study

Purpose

We investigated the clinicopathological features and management for superficial nonampullary duodenal tumors (SNADTs). The safety and feasibility of laparoscopic management, especially laparoscopic endoscopic cooperative surgery (LECS), were evaluated.

Methods

A total of 59 patients with SNADTs who underwent operations from January 2009 to December 2018 at all 8 institutions of the Catholic Medical Center were identified in our comprehensive multi-institutional database. Clinicopathological and surgical data on the 4 anatomical regions of the duodenum were collected and compared. Characteristics of conventional laparoscopic procedure (laparoscopy-only) and LECS procedures were also compared.

Results

There were significantly more asymptomatic patients with tumors in the first and second vs. third and fourth duodenal regions. Gastrointestinal stromal tumors (GISTs), carcinoids, and ectopic pancreatic tumors were identified in 32, 12, and 5 cases, respectively. Forty-two patients (71.2%) underwent laparoscopy. Of patients undergoing laparoscopy, the LECS group exhibited significantly more endophytic features and smaller tumor sizes (P < 0.001 and P < 0.001, respectively). Although no significant difference in the wedge resection or postoperative complication rate was seen between the 2 groups (P = 0.096 and P = 0.227, respectively), the wedge resection rate was higher, and the complication rate lower, in the LECS group than the conventional laparoscopic surgery group.

Conclusion

Most of the SNADTs located in proximal duodenum were detected incidentally. GISTs were the most common diagnoses of SNADTs in all locations. In treating these tumors, laparoscopic resection is safe and feasible. Especially, LECS may be ideal for treating small endophytic tumors, minimizing over-resection and postoperative complications.

Predictors of technical difficulty for complete closure of mucosal defects after duodenal endoscopic resection

BACKGROUND AND AIMS

It has been reported that the prophylactic closure of mucosal defects after duodenal endoscopic resection (ER) can reduce delayed adverse events; however, under certain circumstances, this can be technically challenging. Therefore, the aim of this study was to determine the predictors of difficulty during the complete closure of mucosal defects after duodenal ER.

METHODS

This was a retrospective study of duodenal lesions that underwent ER between July 2010 and May 2020. We reviewed the endoscopic images and analyzed the relationships between the degree of closure or closure time and clinical features of the lesions using univariate and multivariate analyses.

RESULTS

We analyzed 698 lesions. The multivariate analysis revealed that lesion location in the medial or anterior wall (odds ratio, 2.8; 95% confidence interval, 1.36-5.85; P < .01) and a large lesion size (odds ratio, 1.4; 95% confidence interval, 1.07-1.89; P = .03) were independent predictors of an increased risk of incomplete closure. Moreover, a large lesion size (β coefficient, .304; P < .01), an occupied circumference over 50% (β coefficient, .178; P < .01), intraoperative perforation (β coefficient, .175; P < .01), treatment period (β coefficient, .143; P < .01), and treatment with endoscopic submucosal dissection (β coefficient, .125; P < .01) were independently and positively correlated with a prolonged closure time in the multiple regression analysis.

CONCLUSIONS

This study revealed that lesion location in the medial or anterior wall and lesion size affected the incomplete closure of mucosal defects after duodenal ER, and lesion size, occupied circumference, intraoperative perforation, treatment period, and treatment method affected closure time.

The mucin phenotype does not affect the endoscopic resection outcome of non-ampullary duodenal epithelial tumors

Background and study aims  Some studies have reported an association between clinicopathological features and mucin phenotypes of non-ampullary duodenal epithelial tumors (NADETs). However, the association between clinical outcomes of endoscopic resection (ER) and mucin phenotypes has not been elucidated. The aim of this retrospective study was to analyze clinical outcomes of ER of NADETs with reference to mucin phenotypes. Patients and methods  We retrospectively evaluated the clinical outcomes of ER for NADETs performed from 2006 to 2019 and compared clinicopathological characteristics, ER procedures, and outcomes, including adverse events (AEs) among tumors classified by mucin phenotype. Mucin phenotypes were classified as gastric, gastrointestinal, and intestinal based on immunohistochemical examination. Grade of dysplasia was determined according to the Vienna classification (VCL). Results  The proportion of VCL 4/5 was higher in the gastric type (50 %) compared with that in the gastrointestinal (39.1 %, P  = 0.009) and intestinal types (5.4 %, P  = 0.008), respectively. With no statistical difference in tumor size and ER method among the three groups, no significant difference was observed for ER outcomes, i. e., en bloc and R0 resection rates. In the gastrointestinal and intestinal types, AEs occurred in four cases treated with ESD, but none developed in the gastric type. Conclusions  This study suggests that the mucin phenotype does not affect resection outcome. However, considering high malignant potential and tendency for low AE rates, the gastric type NADETs may be more appropriate for proactive ER than the others.

Current status of endoscopic diagnosis and treatment for superficial non-ampullary duodenal epithelial tumors

Though superficial non-ampullary duodenal epithelial tumors (SNADETs) have been traditionally considered rare, there is a growing detection under the development and widespread of endoscopic techniques in recent times. Many case studies have revealed early manifestations of lesions through advanced endoscopic technology, however, because of the low incidence of duodenal tumors and challenges in diagnosing, the preoperative diagnosis criteria have not been established so far. In spite of this, recently the increasing detection rate of early duodenal epithelial lesions enhances the demand for minimally invasive treatment as well. The most suitable therapeutic endoscopic modality to remove duodenal lesions should be selected according to the size, location and histological invasive depth of duodenal lesions. Nevertheless, due to the special anatomical structure of the duodenum, the incidence of complications is much higher than in any other part of the digestive tract. To prevent these adverse events prophylactically, a few novel strategies have been applied effectively after resection. This review describes the current status of preoperative endoscopic diagnosis and endoscopic resection approaches, as well as countermeasures for avoiding procedure-related complications.