Native Esophagus Research Articles

Our experience in repairs using the native esophagus such as the Foker and Gazi methods in the management of patients with long-gap esophageal atresia.

This study aimed to share our experience with infants with repaired long-gap esophageal atresia (LGEA) using the native esophagus and Foker and Gazi methods. We retrospectively analyzed the medical records of 10 patients with LGEA (six with pure esophageal atresia [EA], and four with distal trachea-esophageal fistula [TEF] + EA). The mean length between the esophageal pouches was 5.9 cm (4-9 cm). Five Foker methods, three Gazi methods, and two delayed primary repairs after a daily bougie were performed an average of 19.3 days after the first surgery and 26.4 days after the final esophageal anastomosis. For the Foker technique, it was 36.1 days. Their first oral intake was 10.2 days, and their transition to full enteral food was 26.2 days. An esophageal leak was detected in six patients. Fundoplication and dilatations were performed for three and four patients, respectively. For good results, LGEA patients should be operated on at least under the supervision of an experienced surgeon in specialized centers, and the team should be familiar with the techniques for using the native esophagus.

Management Strategies and Outcomes of Distal Congenital Esophageal Strictures in the Setting of Long-gap Esophageal Atresia

BackgroundThe management of neonates with long-gap esophageal atresia (LGEA) combined with distal congenital esophageal strictures (CES) is challenging. We sought to review our approach for this rare set of anomalies. MethodsWe reviewed children with LGEA + CES surgically treated at two institutions (2018–2024). LGEA repair was performed using the Foker technique (traction-induced esophageal lengthening). A CES strategy was chosen based on preoperative evaluations and intraoperative findings. The configuration and length of the CES were assessed using retrograde flexible esophagoscopy via gastrostomy with contrast fluoroscopy. ResultsEight patients (75% male) with LGEA + CES were treated: Four had type A and four had type B EA. Median gap length was 3.5 cm. Three underwent thoracoscopic esophageal lengthening. After a median follow-up of 18 months (IQR: 9–25), all retained their native esophagus. However, those who had CES resection concurrent with the lengthening process or at the time of EA anastomosis had more challenging perioperative courses: one required additional time on traction and another required esophageal anastomotic stricture resection. ConclusionsOur experience with LGEA and distal CES emphasizes tailoring surgical approaches to each patient's unique condition, avoiding a one-size-fits-all strategy. However, if the esophageal tissue above the distal CES is in good condition, our preference has shifted towards retaining the CES during traction, performing gentle dilation at anastomosis time, and conducting definitive endoscopic management subsequently. We would caution against making the assumption that salvage of the native esophagus is not possible or that resection of the CES is always needed. Level of EvidenceLevel III.

Management of long-gap esophageal atresia.

A uniquely challenging subset of infants diagnosed with esophageal atresia (EA) are those born with long-gap EA (LGEA). The common unifying feature in infants with LGEA is that the proximal and distal segments of the esophagus are too far apart to enable primary anastomosis via a single operation in the newborn period. Although any type of EA can technically result in a long gap, the Gross type A variant occurs in 8% of all EA cases and is most commonly associated with LGEA. In this review, we provide an evidence-based approach to the current challenges and management strategies employed in LGEA. There are fortunately a range of available surgical techniques for LGEA repair, including delayed primary repair, staged repair based on longitudinal traction strategies to lengthen both ends (e.g., Foker procedure, internal traction), and esophageal replacement using other portions of the gastrointestinal tract. The literature on the management of LGEA has long been dominated by single-center retrospective reviews, but the field has recently witnessed increased multi-center collaboration that has helped to increase our understanding on how to best manage this challenging patient population. Delayed primary repair is strongly preferred as the initial approach in management of LGEA in the United States as well as several European countries and is supported by the American Pediatric Surgery Association recommendations. Should esophageal replacement be required in cases where salvaging the native thoracic esophagus is not possible, gastric conduits are the preferred approach, based on the relative simplicity of the operation, low postoperative morbidity, and long-term durability. Long-term followup for monitoring of swallowing function, nutritional status, aspiration/respiratory illnesses, gastroesophageal reflux, and associated comorbidities is essential in the comprehensive care of these complex patients.

Long-gap esophageal atresia: is native esophagus preservation always possible?

Esophageal atresia (EA) is a congenital defect that causes esophageal discontinuity, often with an associated tracheo-esophageal fistula (TEF) in 70%-90% of cases. When the distance between esophageal ends precludes primary anastomosis, it results in long gap esophageal atresia (LGEA), complicating the surgical management. This study retrospectively reviewed LGEA cases from the past decade, treated with the goal of preserving the native esophagus, comparing surgical techniques and outcomes with current literature. The data of patients treated for LGEA between 2013 and 2024 were collected from medical charts, focusing on patients treated with the preservation of their native esophagus. Ten patients were enrolled for this study. All of them had a gap between the esophageal ends equal to or greater than three vertebral bodies. Four patients (40%) underwent a delayed primary anastomosis (DPA) procedure, while the remaining six (60%) underwent a traction staged repair. All patients were treated with open surgery. The follow-up period extended from 3 months to 10 years. Preserving the native esophagus in patients with LGEA is a challenging but feasible goal, with delayed primary anastomosis and traction techniques playing key roles. We advocate for the preservation of the native esophagus as the preferred approach for ensuring a high quality of life for patients, as it helps to avoid severe long-term complications associated with esophageal substitution.

Esophageal replacement in children - 27 years of experience in a University Hospital.

esophageal replacement in children is indicated when it is impossible to maintain the native esophagus, which in the pediatric population includes patients with esophageal atresia and esophageal caustic stenosis. The objective of this communication is to report the experience of a university service with two techniques of esophageal replacement. this is a retrospective study based on the revision of hospital files. The study population consisted of patients who underwent esophageal replacement from 1995 to 2022, at the Hospital de Clínicas of the State University of Campinas. The analyzed data were age, sex, underlying disease, technical aspects, complications, and long-term results. during the study period, 30 patients underwent esophageal replacement. The most common underlying diseases were esophageal atresia (73.33%) and caustic stenosis (26.67%). Twenty-one patients underwent gastric transposition (70%), and nine underwent esophagocoloplasty (30%). The most frequent postoperative complication was fistula of the proximal anastomosis, which occurred in 14 patients. Most of the patients with fistulas had a spontaneous recovery. There were three deaths. Of the 27 survivors, 24 can feed exclusively by mouth. esophageal replacement in children is a procedure with high morbidity and mortality. Esophagocoloplasty and gastric transposition have similar results and complications, with the exception of proximal anastomotic fistulas, which are generally self-resolving and are more common in esophagocoloplasty. The choice of the best surgical technique must be individualized according to the patients characteristics and the surgeons experience, as both techniques offer the ability to feed orally in the short or medium term.

What Proportion of Children With Complex Oesophageal Atresia Require Oesophageal Lengthening Procedures?

IntroductionBabies with oesophageal atresia (OA) who cannot achieve a primary anastomosis (complex OA) may be treated by attempted oesophageal lengthening. We contrast reported outcomes of lengthening with our experience of managing complex OA. Patients and methodsA consecutive series treated in an English regional centre was completed. Outcomes of interest were the rate of retention of the native oesophagus, complications requiring thoracotomy, rates of anastomotic leak, stricture, fundoplication, and mortality. Possible explanatory variables were the surgical techniques applied. Results29/215 (13%) OA were complex, and 25/207 survived to repair. 14/25 (56%) had no distal fistula, pure OA, while 11/25 (44%) had a long gap with distal fistula. 18/25 (72%) had delayed primary anastomosis, while 7/25 (28%) required oesophageal replacement. However, 2 of the replacements were salvage procedures following failed traction. Only 4/207 (2%) of OA were potentially treatable by traction. Salvage surgery was required in 2/23 (9%) complex OA not subjected to lengthening. The native oesophagus was retained without utilising lengthening in 200/207 (97%). Amongst complex OA where traction techniques had not been attempted, the native oesophagus was retained in 18/23 (78%) of cases, with median time to oesophageal continuity of 77 days. There was no in hospital mortality following treatment of complex OA, and overall survival was identical to non-complex OA among cases surviving to anastomosis. DiscussionManagement of complex OA without lengthening procedures leads a similar rate of retention of the native oesophagus as reports describing lengthening, but with significantly less morbidity. We see little need for oesophageal lengthening in the management of complex OA. Level of EvidenceIV.

Kimura extrathoracic esophageal elongation for the treatment of complex esophageal atresia: Primary versus secondary treatment when other strategies failed

IntroductionThe Kimura´s extrathoracic esophageal elongation (KEEE) procedure uses upper esophageal pouch traction to induce its growth, as an alternative to repair long gap esophageal atresia (LGEA). It can be used as a first option in the neonatal period (primary Kimura) or as a rescue procedure when another strategy fails (secondary Kimura).The aim of our study is to compare the results of the primary versus secondary Kimura procedure after unsuccessful Puri procedure or end-to-end esophageal anastomosis. MethodsThe present work is a retrospective review of patients with complex esophageal atresia (CEA) who underwent Kimura procedure at our institution from 1997 to 2021. We divided the patients into two groups, primary group: patients who underwent primary Kimura extrathoracic esophageal elongation (KEEE), esophagostomized in the first surgical intervention; and secondary group: those who underwent secondary KEEE, esophagostomized due to complications of the primary end-to-end anastomosis (EEA), or due to failure of preservation of native esophagus (PNE) techniques. Demographic variables (gestational age, birth weight, type of esophageal atresia (EA) and associated malformations) and evolution variables related to the elongations and reconstruction (days of mechanical ventilation (MV), days of hospitalization and complications of the anastomosis, feeding/oral aversion, need for nutritional support, gastroesophageal reflux disease (GERD), and mortality) were evaluated. ResultsDuring the 24-year period, 31 patients were evaluated, nine patients belonged to the primary group (of which 7 were reconstructed) and the remaining twenty-two to the secondary group (of which 12 completed the procedure).Regarding demographic variables, there was a statistical difference in gestational age (p = 0.016). Regarding the variables associated with the elongations, there was a statistically significant lower number of elongations (p = 0.0547), longer hospitalization time (p = 0.045) and more complications (p = 0.027) for the secondary group. Regarding the final reconstruction, the primary group had a significantly shorter postoperative hospital stay (p = 0.03), and also fewer days on MV, although these variables did not reach a statistically significant difference.Two patients died before the final reconstruction (one from each group). DiscussionWe believe that KEEE is a useful tool for both primary treatment and rescue in case of failure of other esophageal preservation strategies. In addition, it allows preserving the native esophagus and also performing esophageal replacement strategies with other organs if it fails. Level of evidenceAccording to the Journal of Pediatric Surgery this research corresponds to type of study level III for retrospective comparative study.

Extrathoracic esophageal elongation with Foker technique in patients with Type-A esophageal atresia. A case series

Background: Long-gap esophageal atresia (EA) is not amenable to primary anastomosis though the goal of surgical treatment is to restore the patency in the native esophagus; the Foker technique is one of the methods that can accomplish it. Case Presentation: This case series consists of three patients who presented with a type-A long-gap EA. Extrathoracic esophageal elongation was achieved using the Foker technique. During the first stage, we utilized pledgeted sutures reinforced with titanium clips for elongation that began five days after the surgery. As the elongation progressed, and the gap between esophageal pouches decreased, we restored the continuity of the esophagus. On follow-up, all patients needed pneumatic dilatation of the esophagus. Conclusion: The Foker technique successfully restored the esophageal continuity using the native esophagus in our patients with esophageal atresia.

Long-gap esophageal atresia: management, most frequent complications, and expert recommendations – review of literature

Introduction and aim of the study. Long-gap esophageal atresia (LGEA) is a congenital anomaly in which the gap between both ends of the esophagus exceeds three intervertebral spaces and is an esophageal atresia without air in the abdomen. The defect is both therapeutic and surgical challenge. This review aims at providing an overview of the most recent literature on the effective methods for treatment of LGEA, and the most frequent complications and experts’ recommendations on this subject.
 Material and methods. The systematic review was based on available data collected using PubMed database and the Google Scholar web search engine.
 Analysis of the literature. There is no consensus on the ideal technique for surgical treatment of LGEA. There are two possible approaches for opening the thorax – thoracotomy and thoracoscopy. The techniques stimulating esophageal elongation include external and internal traction techniques, magnetic compression anastomosis and intramural botulinum type A toxin injection. Replacement methods are a viable option when it is impossible to preserve the native esophagus. Decellularized matrices seem to be promising in developing an esophageal substitute. Regardless of the surgical approach a common complication of surgical treatment is anastomotic stenosis which requires further surgical interventions.
 Conclusion. Elongation techniques are effective in approximation of the proximal and distal esophagus. The future lies with tissue engineering and inventing an off-the-shelf esophageal substitute. The centralization of treatment is recommended. After discharge from hospital interdisciplinary outpatient assessment and care is required. Further prospective studies are needed to determine the optimal mode of treatment and prevent complications associated with LGEA.

Long-term course of children who underwent the laparoscopic Collis–Nissen procedure. Preliminary communication

IntroductionShort esophagus is the inability to obtain an adequate abdominal esophageal portion during anti-reflux surgery. An alternative treatment is the Collis type esophagogastroplasty. This minimally invasive procedure has been performed on children, but it is not known what happens in the long term. The objective is to know the long-term evolution in children who underwent the minimally invasive Collis-Nissen procedure. Material and methodsAn IRB exempt prospective, observational study of a case series of patients with short esophagus who underwent a laparoscopic Collis-Nissen procedure more than 5 years after surgery. All of them underwent a contrasted study and endoscopy with biopsy 5 years after the surgery. ResultsThe study included 8 children 5 years after having surgery. Mostly asymptomatic. The esophagogastroduodenal series showed the same caliber in the native esophagus as in the gastroplasty with adequate clearance and functional fundoplication. Endoscopy showed growth of the gastroplasty, continent cardia and an efficient fundoplication. Histopathologic study of the gastroplasty showed chronic nonspecific inflammation with pseudostratified mucin-producing columnar pseudostratified epithelium with adequate maturation. DiscussionThe Collis-Nissen procedure in children using the cardia area and the proximal part of the lesser curvature is useful in the long-term control of reflux disease, preserving an adequate portion of the abdominal esophagus without peptic complications. Level of evidenceII

Delayed primary anastomosis for repair of long-gap esophageal atresia: technique revisited

The operative management of patients born with long-gap esophageal atresia (LGEA) remains a major challenge for most pediatric surgeons, due to the rarity and complex nature of this malformation. In LGEA, the distance between the proximal and distal esophageal end is too wide, making a primary anastomosis often impossible. Still, every effort should be made to preserve the native esophagus as no other conduit can replace its function in transporting food from the oral cavity to the stomach satisfactorily. In 1981, Puri et al. observed that in newborns with LGEA spontaneous growth and hypertrophy of the two segments occur at a rate faster than overall somatic growth in the absence of any form of mechanical stretching, traction or bouginage. They further noted that maximal natural growth arises in the first 8–12 weeks of life, stimulated by the swallowing reflex and reflux of gastric contents into the lower esophageal pouch. Since then, creation of an initial gastrostomy and continuous suction of the upper esophageal pouch followed by delayed primary anastomosis at approximately 3 months of age has been widely accepted as the preferred treatment option in most LGEA cases, generally providing good functional results. The current article offers a comprehensive update on the various aspects and challenges of this technique including initial preoperative management and subsequent gap assessment, while also discussing potential postoperative complications and long-term outcome.

Distal Recurrent Tracheoesophageal Fistula after Repair of Esophageal Atresia-Incidence, Risk Factors, and Outcome.

The aim of this study was to assess incidence, risk factors, and outcomes of distal recurrent tracheoesophageal fistula (RTEF) after repair of esophageal atresia (EA). Ethical consent was obtained. Data collection was done by review of hospital records of 286 patients (268 in-house and 18 referred) who underwent repair of type C or D EA from 1980 to 2021. Spitz class, long-gap (tracheoesophageal fistula at carina), fundoplication, leakage, and stricture were assessed as RTEF risk factors. Outcome measures were long-term closure of RTEF, retainment of native esophagus, and survival. RTEF occurred in 23 patients (19 in-house) with type C (n = 22) or type D (n = 1) EA with median 4.4 (interquartile range [IQR]: 1.7-13) months after repair. Five patients had late RTEF 3.5 to 16 years after repair. Nineteen (7.3%) in-house patients developed RTEF. Presenting symptoms, age at diagnosis, and presence of anastomotic stricture (AS) are listed. No statistically significant risk factors were found, risk ratio of 0.5 to 2.7 (IQR: 0.1-8.7), p-value of 0.25 to 0.75. Detached closure clip and esophageal foreign body contributed to RTEF in two patients. Sixteen patients underwent rethoracotomy for closure of RTEF, 5 (22%) with AS eventually underwent esophageal reconstruction after a period with cervical esophagostomy. Two patients with late-manifested RTEFs underwent closure with laser cauterization. In 22 patients, treatment of RTEF succeeded, whereas 1 (4%) premature patient died of instant re-RTEF. RTEF had an incidence of 7% with diverse patterns of manifestation and predicting factors. Closure rate and patient survival were excellent, but RTEF with AS predicted loss of native esophagus.

Long gap esophageal atresia repair using the foker tecnique: a 19 years experience.

Esophageal atresia (EA) with a 3-cm gap or longer and a very short distal segment represents the extreme of this disorder's spectrum, the treatment of which can be challenging. Management of newborns with long-gap esophageal atresia (LGEA) remains a challenge for pediatric surgeons. The inclusion criteria in the study were as follows: long gap esophageal atresia, Foker technique, at least 10 years follow up. We sought to examine our experiences with LGEA using Foker technique. RESULTS: From 2001 to 2020 were operated for esophageal atresia at the UOC Surgery of the AORN Santobono 290 children of whom 16 patients meet our inclusion criteria. 6 had a type I EA, 2 had a type II and 8 had a type III. Mean gap length was 4 cm (range 3-5), In 9 patients gastrostomy and Foker technique was performed in the same time (around the 1stto the 4th day of life), while in 7 patients gastrostomy was performed in 1st-2nd day of life and the Foker technique was delayed due to clinical needs with a mean of 76 days (range 26-96 days) . In the study group, 11/16 (68,75%) patients underwent multiple endoscopic dilatations ( means 5 sessions per patient); 3 out of 16 cases of early complications occurred: 2 perforations and 1 dehiscence. Gastroesophageal reflux was common during the first 6 years of life and 2 had a fundoplication due to gastroesophageal reflux disease resistant to maximal medical therapy and 1 had an esophageal diverticulum at 5 years. 7 out of 16 (43,7%) (average age 13,5 years) perform therapy cycles with pump inhibitors for an average period of 12 weeks. CONCLUSIONS: Foker procedure for esophageal lengthening in patients with LGEA was successful in mobilizing the esophagus and obtaining a repair in the majority of our patients after 12 to 15 days of traction and it should be considered in LGEA cases to preserve the native esophagus as often as possible.

Mapping the adult human esophagus in vivo and in vitro.

Many esophageal diseases can arise during development or throughout life. Therefore, well-characterized in vitro models and detailed methods are essential for studying human esophageal development, homeostasis and disease. Here, we (1) create an atlas of the cell types observed in the normal adult human esophagus; (2) establish an ancestrally diverse biobank of in vitro esophagus tissue to interrogate homeostasis and injury; and (3) benchmark in vitro models using the adult human esophagus atlas. We created a single-cell RNA sequencing reference atlas using fresh adult esophagus biopsies and a continuously expanding biobank of patient-derived in vitro cultures (n=55 lines). We identify and validate several transcriptionally distinct cell classes in the native human adult esophagus, with four populations belonging to the epithelial layer, including basal, epibasal, early differentiating and terminally differentiated luminal cells. Benchmarking in vitro esophagus cultures to the in vivo reference using single-cell RNA sequencing shows that the basal stem cells are robustly maintained in vitro, and the diversity of epithelial cell types in culture is dependent on cell density. We also demonstrate that cultures can be grown in 2D or as 3D organoids, and these methods can be employed for modeling the complete epithelial layers, thereby enabling in vitro modeling of the human adult esophagus.

Outcome of long gap esophageal atresia at 6 years: A prospective case control cohort study

Summary Background DataEA is the most frequent congenital esophageal malformation. Long gap EA remains a therapeutic challenge for pediatric surgeons. A case case-control prospective study from a multi-institutional national French data base was performed to assess the outcome, at age of 1 and 6 years, of long gap esophageal atresia (EA) compared with non-long gap EA/tracheo-esophageal fistula (TEF). The secondary aim was to assess whether initial treatment (delayed primary anastomosis of native esophagus vs. esophageal replacement) influenced mortality and morbidity at ages 1 and 6 years. MethodsA multicentric population-based prospective study was performed and included all patients who underwent EA surgery in France from January 1, 2008 to December 31, 2010. A comparative study was performed with non-long gap EA/TEF patients. Morbidity at birth, 1 year, and 6 years was assessed. ResultsThirty-one patients with long gap EA were compared with 62 non-long gap EA/TEF patients. At age 1 year, the long gap EA group had longer parenteral nutrition support and longer hospital stay and were significantly more likely to have complications both early post-operatively and before age 1 year compared with the non-long gap EA/TEF group. At 6 years, digestive complications were more frequent in long gap compared to non-long gap EA/TEF patients. Tracheomalacia was the only respiratory complication that differed between the groups. Spine deformation was less frequent in the long gap group. There were no differences between conservative and replacement groups at ages 1 and 6 years except feeding difficulties that were more common in the native esophagus group. ConclusionsLong gap strongly influenced digestive morbidity at age 6 years.

The novel application of an emerging device for salvage of primary repair in high-risk complex esophageal atresia

IntroductionPreservation of native esophagus is a tenet of esophageal atresia (EA) repair. However, techniques for delayed primary anastomosis are severely limited for surgically and medically complex patients at high-risk for operative repair. We report our initial experience with the novel application of the Connect-EA, an esophageal magnetic compression anastomosis device, for salvage of primary repair in 2 high-risk complex EA patients. Compassionate use was approved by the FDA and treating institutions. Operative TechniqueTwo approaches using the Connect-EA are described – a totally endoscopic approach and a novel hybrid operative approach. To our knowledge, this is the first successful use of a hybrid operative approach with an esophageal magnetic compression device. OutcomesSalvage of delayed primary anastomosis was successful in both patients. The totally endoscopic approach significantly reduced operative time and avoided repeat high-risk operation. The hybrid operative approach salvaged delayed primary anastomosis and avoided cervical esophagostomy. ConclusionThe Connect-EA is a novel intervention to achieve delayed primary esophageal repair in complex EA patients with high-risk tissue characteristics and multi-system comorbidities that limit operative repair. We propose a clinical algorithm for use of the totally endoscopic approach and hybrid operative approach for use of the Connect-EA in high-risk complex EA patients.

Biofabrication of an Esophageal Tissue Construct from a Polymer Blend Using 3D Extrusion‐Based Printing

Many tissue engineering approaches are being explored to offer solutions for diseased esophageal tissue and its repair. However, classical techniques in tissue engineering are not capable of recapitulating the structural and functional parameters of native esophagi. Esophageal 3D bioprinting is yet an emerging field but holds great promise in meeting this challenge. Herein, the use of extrusion‐based 3D printing is examined to generate esophageal substitutes from a polymer blend‐based formulation. The fabricated 3D esophageal structures are printed at a very high speed without collapse and without the use of supporting material. In vitro analysis reveals that the printed material enables cell adhesion, proliferation, and migration into the deeper zones. Moreover, the designed construct is suturable to the native esophagus and exhibits no leakage while offering mechanical properties similar to that of the native tissue. Overall, these biochemical and biomechanical features make the reported artificial esophagus a promising solution for the repair of damaged esophagi.

S2062 Sudden Dysphagia After Total Laryngopharyngectomy

Introduction: Total laryngopharyngectomy is done for extensive laryngeal and hypopharyngeal cancers, including squamous cell carcinoma and advanced thyroid cancer. The surgery’s aim is to remove cancer, and restore continuity of the oral cavity and esophagus. Most commonly a skin flap is used to recreate a neopharynx connecting the mouth to the esophagus. A favored method is to use the anterior thigh flap. Common sequelae of this surgery include fistula formations and strictures. We present a case of food impaction in the post surgical period of an anterolateral thigh flap reconstruction after squamous cell carcinoma of the larynx. Case Description/Methods: A 58 y male with a history of squamous cell carcinoma of the larynx complicated by tumor invasion of the cervical esophagus and epiglottis status post total laryngopharyngectomy, tracheostomy, G tube, and cricothyroidotomy presented to the ED with discomfort after eating lasagna. His post surgical course had been complicated by recurrent fistula formation and was therefore recommended NPO status and a salivary bypass tube was placed. Following his meal he felt a foreign body sensation, dysphagia, and vomited. On physical exam he was noted to be uncomfortable but was able to tolerate his oral secretions. An esophagram revealed occlusion of the proximal salivary bypass tubing and an EGD was subsequently performed. Using a pediatric scope the salivary bypass tubing was entered and retained food was seen. Using gentle suctioning, water, and forceps, the food was pushed into the native esophagus. The patient's symptoms resolved following the procedure and he was discharged on tube feeds. Discussion: Pharyngoesophageal reconstruction with an anterolateral thigh flap reconstruction is a favored surgical technique after total laryngectomy. To prevent or treat a post surgical fistula or stricture, a salivary bypass tube may be placed. While studies show that the majority of patients are eventually able to tolerate nutrition by mouth, gastroenterologists should be aware of the risk of food bolus given the narrow diameter and lack of distensibility and motility of the bypass tubing.Figure 1.: Endoscopy image showing. Red arrow: Inlet patch Blue arrow: melanocytosis.

First-in-Human Segmental Esophageal Reconstruction Using a Bioengineered Mesenchymal Stromal Cell–Seeded Implant

IntroductionResection and reconstruction of the esophagus remains fraught with morbidity and mortality. Recently, data from a porcine reconstruction model revealed that segmental esophageal reconstruction using an autologous mesenchymal stromal cell-seeded polyurethane graft (Cellspan esophageal implant [CEI]) can facilitate esophageal regrowth and regeneration. To this end, a patient requiring a full circumferential esophageal segmental reconstruction after a complex multiorgan tumor resection was approved for an investigational treatment under the Food and Drug Administration Expanded Access Use (Investigational New Drug 17402). MethodsAutologous adipose-derived mesenchymal stromal cells (Ad-MSCs) were isolated from the Emergency Investigational New Drug patient approximately 4 weeks before surgery from an adipose tissue biopsy specimen. The Ad-MSCs were grown and expanded under current Good Manufacturing Practice manufacturing conditions. The cells were then seeded onto a polyurethane fiber mesh scaffold (Cellspan scaffold) and cultured in a custom bioreactor to manufacture the final CEI graft. The cell-seeded scaffold was then shipped to the surgical site for surgical implantation. After removal of a tumor mass and a full circumferential 4 cm segment of the esophagus that was invaded by the tumor, the CEI was implanted by suturing the tubular CEI graft to both ends of the remaining native esophagus using end-to-end anastomosis. ResultsIn this case report, we found that a clinical-grade, tissue-engineered esophageal graft can be used for segmental esophageal reconstruction in a human patient. This report reveals that the graft supports regeneration of the esophageal conduit. Histologic analysis of the tissue postmortem, 7.5 months after the implantation procedure, revealed complete luminal epithelialization and partial esophageal tissue regeneration. ConclusionsAutologous Ad-MSC seeded onto a tubular CEI tissue-engineered graft stimulates tissue regeneration following implantation after a full circumferential esophageal resection.

Caustic and Toxic Ingestions

Ingestion of caustic substances remains a potentially fatal public health concern with extensive morbidity and the possibility of long-term sequelae. The management strategies of these complex injuries continue to be extensively studied in the literature. Areas of interest include the most efficacious treatment of caustic esophageal stricture to preserve the native esophagus, use of steroids, and use of esophageal stents. Prevention of accidental ingestion through strategies to limit the availability of caustic substances is a key factor in reducing the incidence of injury, but there continues to be a high rate of accidental ingestion in developing countries with less rigorous manufacturing standards. Initial evaluation includes endoscopic evaluation of the esophagus and tracheobronchial tree. Optimal treatment strategies, including the use of proton pump inhibitors to reduce gastroesophageal reflux, steroid use to prevent stricture formation, and use of stents for management of strictures, continue to be debated. Initial surgical management includes esophagectomy for full-thickness injury with abdominal exploration. Multiple surgical options exist for both restoration of gastrointestinal continuity after esophagectomy and the management of strictures refractory to medical management, including reverse gastric tube, colonic interposition, and gastric advancement. Numerous small studies have evaluated the efficacy of these interventions, but there continues to be a need for larger prospective studies to develop a worldwide consensus opinion on best practices. We provide a review of the recent literature and practice recommendations for the management of injuries due to caustic ingestion. This review contains 7 figures, 10 tables, and 51 references. Key words: caustic ingestion, endoscopic management, stricture, surgical management