Meckel's diverticulum is a rare cause of mechanical ileus in adults.

Meckel's diverticulum is the most common congenital gastrointestinal defect with a prevalence of 2%. It is mostly asymptomatic and it rarely causes acute abdomen in adults. In this case report, a 28-year-old male with no previous abdominal surgery presented with clinical symptoms of small bowel obstruction. Surgery revealed a Meckel's diverticulum adherent to the abdominal wall, causing internal herniation with small bowel obstruction. The diverticulum was openly resected and no post-operative complications occurred. Laparoscopy seems safe, and surgical removal of the symptomatic Meckel's diverticulum is recommended.

Extraskeletal myxoid chondrosarcoma metastasis to a Meckel's diverticulum adenocarcinoma.

Extraskeletal myxoid chondrosarcoma is a rare soft tissue tumour with a high local and distant metastasis rate and limited response to chemotherapy. Meckel's diverticulum is the most frequent congenital anomaly, and it is associated with a considerable risk of malignant transformation. In this case report, we describe a 50-year-old female patient with a history of extraskeletal myxoid chondrosarcoma of the lower limb and metastasis to the forearm who went to the emergency department with abdominal pain. The investigations revealed a caecal volvulus. A lesion in the middle third of the ileum was incidentally discovered and removed during surgery. Pathology examination revealed a Meckel's diverticulum adenocarcinoma, with metastasis of extraskeletal myxoid chondrosarcoma. Resection was complete; however, the patient had diffuse metastatic pulmonary disease and died eight months later due to disease progression. This mechanism of tumour-to-tumour metastasis is described in other locations, but, regarding the Meckel's diverticulum, this is a unique situation, previously unreported in the literature.

A Rare Case of Small Bowel Obstruction in a 15-Year-Old Girl: Internal Hernia Associated with Meckel's Diverticulum.

BACKGROUND Meckel's diverticulum is a congenital remnant of the omphalomesenteric duct and is the most common congenital gastrointestinal malformation. Most patients are asymptomatic, but a rare presentation is with subacute small bowel obstruction (SBO) due to herniation of bowel loops through an internal hernia formed by the Meckel's diverticulum and adjacent mesentery that forms an internal hernia. This report is of a 15-year-old girl presenting as an emergency with vomiting and small bowel obstruction due to an internal hernia associated with Meckel's diverticulum. CASE REPORT We present a case of a 15-year-old girl who presented to the Children's Emergency (CE) department with persistent vomiting and abdominal distension and tenderness. X-rays demonstrated dilated small bowel loops, prompting admission under Pediatric Surgery (PAS). A subsequent computed tomography (CT) scan was performed, which demonstrated multiple dilated small bowel loops, confirming SBO, and a blind-ending "C-shaped" bowel loop at the region of the terminal ileum. A diagnostic laparotomy was performed, which confirmed the presence of a Meckel's diverticulum. The tip of the Meckel's diverticulum was adherent to part of the small bowel mesentery, forming an internal hernia defect through which a loop of proximal ileum had herniated, resulting in SBO. She then underwent a laparoscopy-assisted transumbilical Meckel's diverticulectomy (LATUM). The patient recovered uneventfully and was discharged on the 4th postoperative day. CONCLUSIONS In children presenting with SBO, the possibility of Meckel's diverticulum as an etiology should be considered as a differential diagnosis. Early diagnosis and prompt intervention will improve clinical outcomes and avoid complications.

Divertículo de Meckel complicado. Experiencia de 15 años en un hospital interzonal / Complicated Meckel's diverticulum. Fifteen years of experiencein an interzonal hospital in the Province of Buenos Aires

Introducción: el divertículo de Meckel es la anomalía congénita más frecuente del tracto gastrointestinal. Puede presentarse con hemorragia, obstrucción intestinal o diverticulitis, complicaciones que disminuyen con la edad, por lo que en el adulto el diagnóstico suele ser incidental. El tratamiento de las complicaciones es quirúrgico, mediante diverticulectomía o resección segmentaria del intestino delgado, dependiendo de sus características morfológicas. Objetivo: analizar nuestra experiencia en el manejo del divertículo de Meckel complicado en un período de 15 años. Diseño: estudio descriptivo, observacional, transversal, retrospectivo. Material y métodos: se revisaron las historias clínicas de los pacientes operados por divertículo de Meckel complicado en el Servicio de Cirugía General del Hospital San Roque durante el periodo 2007-2022. Se registraron datos demográficos, presentación clínica, diagnóstico preoperatorio, tratamiento quirúrgico, complicaciones postoperatorias y hallazgos histopatológicos. Resultados: se incluyeron 25 pacientes, 21 (84%) hombres, 3 menores de 18 años. La presentación clínica fue un síndrome de fosa iliaca derecha en el 80% de los casos, obstrucción intestinal en el 16% y hemorragia en el 4%. En solo 2 casos se realizó el diagnóstico preoperatorio, confirmado mediante tomografía computada. Se realizó diverticulectomía en el 68% de los pacientes y resección segmentaria el 32%. El abordaje fue laparotómico en el 64%, principalmente en el periodo inicial y laparoscópico en el 36%. Hubo una complicación IIIb de Clavien-Dindo en un paciente pediátrico tratado con drenaje percutáneo. En un solo paciente (4%), que se presentó con hemorragia digestiva masiva, se encontró epitelio de tipo gástrico y páncreas ectópico en el divertículo. Conclusiones: En nuestra experiencia el divertículo de Meckel complicado se presentó predominantemente en hombres. La complicación más frecuente en el adulto fue la diverticulitis. El diagnóstico preoperatorio fue infrecuente y realizado por tomografía computada. La diverticulectomía es suficiente en la mayoría de los casos. Actualmente, la laparoscopia es una herramienta segura, rentable y eficiente que permite el diagnóstico y tratamiento oportunos de esta entidad. (AU)

Introduction: Meckel's diverticulum is the most common congenital malformation of the gastrointestinal tract. It can present with bleeding, intesti-nal obstruction or diverticulitis, complications that decrease with age, so in adults the diagnosis is usually incidental. Treatment of complications is surgical, through diverticulectomy or segmental resection of the small intestine, depending on its morphological characteristics. Objective: to analyze our experience in the management of complicated Meckel's diverticulum over a period of 15 years. Design: descriptive, observational, cross-sectional, retrospective study. Materials and methods: the medical records of patients operated on for complicated Meckel's diverticulum in the General Surgery Service of the San Roque Hospital during the period 2007-2022 were reviewed. Demo-graphic data, clinical presentation, preoperative diagnosis, surgical treatment, postoperative complications, and histopathological findings were recorded. Results: twenty-five patients were included, 21 (84%) men, 3 under 18 years of age. The clinical presentation was a right iliac fossa syndrome in 80% of cases, intestinal obstruction in 16% and hemorrhage in 4%. In only 2 cases was the preoperative diagnosis made, confirmed by computed tomography. Diverticulectomy was performed in 68% of patients and segmental resection in 32%. The approach was by laparotomy in 64%, mainly in the initial period, and by laparoscopy in 36%. There was a Clavien-Dindo IIIb complication in a pediatric patient treated with percutaneous drain-age. In only one patient (4%), who presented with massive gastrointestinal bleeding, gastric-type epithelium and ectopic pancreas were found in the diverticulum. Conclusions: In our experience, complicated Meckel's diverticulum occurred predominantly in men. The most frequent complication in adults was diverticulitis. Preoperative diagnosis was infrequent and was made by computed tomography. Diverticulectomy is sufficient in most cases. Currently, laparoscopy is a safe, profitable and efficient tool that allows for the timely diagnosis and treatment of this entity. (AU)

[Ileo-colic intussusception in adult secondary to a large neoplasia of the lower caecal fundus]. / L'image du mois. Invagination iléo-colique chez l'adulte secondaire à une volumineuse néoplasie du bas-fond caecal.

Intussusception is rare in adults, accounting for 1 to 5 % of mechanical bowel obstructions. It is due to pathologic lead point within the bowel which is malignant in up to 77 % of cases. Benign lesions may also be responsible for intussusception (polyp, Meckel diverticulum). The lead point is pulled forward by normal peristaltism, prolapsing the affected segment of bowel into another segment. The most common presentation in adults is intermittent abdominal pain and bowel obstruction (nausea, vomiting, inability to pass gas or stools). Abdominal scanner is the key exam for the diagnosis and the treatment is always surgical resection.

Les invaginations grêles et coliques sont rares chez l'adulte, représentant 1 à 5 % des causes d'obstruction digestive mécanique. Elles sont le plus souvent causées par une masse intra-digestive, le péristaltisme entraînant un prolapsus du segment malade vers un segment intestinal adjacent. Elles sont généralement le reflet d'une pathologie maligne du tube digestif (tumeur maligne découverte dans plus de 77 % des cas), mais il peut également exister des causes béniqnes (polype, diverticule de Meckel, adénopathie) . Elles se manifestent sous forme de douleurs abdominales et d'occlusion (nausées, vomissements, arrêt des selles et des gaz). Le scanner abdominal est l'examen de choix pour poser le diagnostic. Le traitement est toujours une résection chirurgicale.

Incarcerated Littre's Umbilical Hernia: A Case Report.

Littre's hernia is an extremely rare type of hernia which has Meckel's diverticulum as its content. A 63-year-old male, presented to the emergency department with chief complaints of swelling and pain around the umbilicus. The patient was diagnosed with an incarcerated umbilical hernia. Following the emergency laparotomy, the intraoperative finding depicted an umbilical Littre's hernia. The patient underwent open Meckel's diverticulectomy with mesh repair. Preoperative diagnosis of Littre's hernia is unlikely due to its low incidence and lack of specific radiological and clinical findings, but the role of computed tomography scan and ultrasound are important in differentiating between strangulated or incarcerated bowel and omentum and in guiding the urgency of operative management. Keywords: case reports; hernia; Meckel diverticulum.

Post-appendicectomy small bowel obstruction due to internal hernia involving Meckel's diverticulum.

Meckel's diverticulum is the most common congenital abnormality of the small bowel, present in about 2% of the population. A man in his 20s underwent a laparoscopic appendicectomy for acute appendicitis and recovered uneventfully. He presented to the emergency department 1 month later with features of acute small bowel obstruction. Emergency diagnostic laparoscopy revealed a band adhesion between the apex of a Meckel's diverticulum to the appendicectomy stump. Internal herniation of ileum under this band adhesion resulted in small bowel obstruction and ischaemic necrosis of the Meckel's diverticulum. The band adhesion was divided, and the Meckel's diverticulum was resected at the base with a linear cutting stapler. This complication has not been reported previously. A Meckel's diverticulum is an important differential diagnosis of acute appendicitis and should routinely be searched for among other pathologies. It can rarely cause a postoperative complication of internal hernia.

Meckel's diverticulum mimicking acute appendicitis in children: a retrospective cohort study.

BACKGROUND: The aims of this study were to summarize the clinical presentation and histological results of 20 cases of complicated Meckel diverticulum (MD) who were presumed to have acute appendicitis before surgery, as well as to improve the diagnosis and treatment of complicated MD in children. MATERIALS AND METHODS: We retrospectively reviewed the records of 20 complicated MD admitted to our institution who were preoperatively diagnosed with acute appendicitis from January 2012 to January 2019. Patients were divided into the perforated MD group and the Meckel's diverticulitis group. Patient demographics, clinical manifestations, laboratory data, auxiliary examinations, surgical methods, and the result of heterotopic tissue were recorded. RESULTS: A total of 20 cases of complicated MD (perforated or diverticulitis) were identified. Children were aged from 3 to 13 years, with a mean age of 7.75 years (median 7.75; range, 1-13 years). Perforated Meckel's diverticulum occurred in 5 of 20 (25%) cases. For perforated MD versus diverticulitis, no significant differences were found between age, time to intervention, length of hospital stay, and distance from the ileo-cecal valve. Heterotopic tissue was confirmed on histopathology in 75% of all patients, including 10 cases of gastric mucosa, 3 cases of coexistent gastric mucosa and pancreatic tissue, and 2 cases of pancreatic tissue. All patients underwent diverticulectomy or partial ileal resection under laparoscopy or laparotomy; two cases combined with appendectomy owing to slight inflammation of the appendix. CONCLUSIONS: The most common presentation of symptomatic MD is painless rectal bleeding; however, it can present symptoms of acute abdomen mimicking acute appendicitis. The key point of diverticulectomy is to remove the ectopic mucosa completely.

Occult bleeding from a false-in-true non-Meckelian ileal diverticulum.

Ileal diverticula can be congenital or acquired and are rare even among the already rare entity of small bowel diverticula. What has never been reported, as far as we know, is false diverticula arising within the true non-Meckelian diverticulum with mesenteric erosion causing an occult gastrointestinal bleed. We present a patient with occult gastrointestinal bleeding from a false-in-true ileal diverticulum. Multiple investigations were required to localise the bleeding site after which the patient was taken to the operating room for a laparoscopic ileocaecectomy with complete resolution of symptoms. Preoperative localisation of the bleeding site may be difficult but is critically important in occult gastrointestinal bleeding. Procedure choice for a bleeding ileal diverticulum is dictated by the distance from the ileocaecal valve and the etiopathology of the bleed.

Ileocolic Intussusception in Infancy is not Always Idiopathic - Adenomyoma as the Leading Point.

BACKGROUND Intussusception is a frequent abdominal emergency in infancy, requiring immediate diagnosis and therapeutic intervention. In approximately 90% of cases, intussusception seems to be idiopathic. There has been a reported association of intussusception with lymphoid hyperplasia of Peyer patches in the terminal ileum, possibly acting as the triggering factor. Clinical presentation varies substantially, while the etiology seems idiopathic in most reported cases. CASE REPORT This case describes a previously healthy 2-month-old girl who presented with an episode of non-bilious vomiting and deterioration during the 12 hours preceding the visit. Abdominal ultrasonography revealed the typical target sign in the right iliac fossa, without visible peristalsis, confirming the diagnosis of intussusception. Failure of non-surgical reduction led to emergency laparotomy with the working diagnosis of intussusception due to Meckel's diverticulum. However, laparotomy instead revealed an adenomyoma of the small intestine, a rare benign tumor-like lesion, as the pathological lead point. CONCLUSIONS This case is interesting for 2 distinct reasons. Not only does it underline the need to maintain a high index of suspicion for triggering factors, even in patients within atypically affected age groups, but it also adds to the remarkably limited selection of reported adenomyomas of the small intestine acting as the pathological lead point for intussusception. In this case report, we aspire to emphasize that especially in patients outside the most affected age group, pediatric surgeons should remain aware of the possibility of adenomyoma as a pathological lead point.

Divertículo de Meckel con tumor neuroendocrino: presentación inusual / Meckel's diverticulum with neuroendocrine tumor: unusual presentation

El divertículo de Meckel es una malformación congénita que suele presentarse como un hallazgo incidental asintomático. Puede complicarse por procesos inflamatorios o tumores, cursando con sintomatología abdominal sumamente inespecífica, lo que complica su diagnóstico oportuno. Aunque la incidencia de neoplasias malignas en estos divertículos es baja, los tumores neuroendocrinos son los más representativos. Presentamos el caso de una paciente de 72 años que consultó por dolor abdominal y deposiciones melénicas, con múltiples nódulos intrahepáticos sugestivos de tumores neuroendocrinos y hallazgo intraoperatorio incidental de diverticulitis aguda de Meckel con metástasis peridiverticular de un tumor neuroendocrino. (AU)

Meckel's diverticulum is a congenital malformation that usually presents as an incidental finding. It can be complicated by inflammatory processes or tumors, with non-specific abdominal symptoms which delay its timely diagnosis. Although the incidence of malignant neoplasms in these diver-ticula is low, neuroendocrine tumors are the most representative. We present the case of a 72-year-old female patient who consulted for abdominal pain and melenic bowel movements, with multiple intrahepatic nodules suggestive of neuroendocrine tumors and an incidental intraoperative finding of acute Meckel's diverticulitis with peridiverticular metastasis of a neuroendocrine tumor. (AU)

Outcomes Following Laparoscopic Versus Open Surgery for Pediatric Intussusception: Analysis Using a National Inpatient Database in Japan.

BACKGROUND: Laparoscopic surgery for pediatric intussusception has recently become more common as an alternative to open surgery. However, the differences in outcomes between laparoscopic and open surgery remain unclear. Thus, this study aimed to compare short-term surgical outcomes and recurrence rates between patients treated with laparoscopic and open surgery for pediatric intussusception. METHODS: Patients aged <18 years who underwent laparoscopic (n = 192) and open (n = 416) surgery for intussusception between April 2016 and March 2021 were retrospectively identified using a Japanese nationwide inpatient database. Propensity-score overlap weighting analyses were conducted to compare the outcomes between the laparoscopic and open surgery groups. The outcomes included in-hospital morbidity, reoperation, readmission for intussusception, bowel resection, the diagnosis of Meckel's diverticulum, duration of anesthesia, postoperative length of hospital stay, and total hospitalization costs. RESULTS: The laparoscopic surgery group was older, heavier, and had fewer congenital malformations and emergency admissions than the open surgery group did. Overlap weighting analyses showed no significant differences in in-hospital morbidity (odds ratio [95% confidence interval], 0.88 [0.35-2.23]), reoperation (1.88 [0.24-14.9]), readmission for intussusception within 30 days (0.80 [0.12-5.30]) and 1 year (0.90 [0.28-2.93]), bowel resection (0.69 [0.46-1.02]), the diagnosis of Meckel's diverticulum (0.97 [0.50-1.90]), duration of anesthesia (difference, 11 [-1-24] minutes), postoperative length of stay (difference, -1.9 [-4.2-0.4] days), or total hospitalization costs (difference, 612 [ -746-1970] US dollars) between the groups. CONCLUSIONS: In this large nationwide cohort, no significant differences in outcomes were observed between laparoscopic and open surgery. Laparoscopic surgery is an acceptable treatment option for pediatric intussusception. LEVELS OF EVIDENCE: Level III.