Gliomatosis peritonei (GP) is a condition characterized by the dissemination of mature glial tissues throughout the peritoneal cavity. It is usually associated with immature ovarian teratoma but presents with mature cystic teratoma (MCT) in 1% of cases. GP, associated with MCT, is a benign disorder. The majority of cases remain asymptomatic and rarely recur. Here, we present a case of a 22-year-old woman with a history of abdominal enlargement and severe abdominal pain who underwent exploratory laparotomy, peritoneal fluid cytology, bilateral salpingo-oophorectomy, appendectomy, omental biopsy, and Jackson-Pratt drain insertion with histopathologic result of GP with MCT. A month later, the patient had a recurrence of abdominal enlargement, necessitating a second surgery. Immunohistochemistry for histopathologic evaluation and diagnostic imaging are crucial in confirming the diagnosis and guiding the treatment strategy. A multidisciplinary team approach in monitoring and comprehensive support is significant in optimizing outcomes for patients with aggressive GPs associated with MCT. Further research and clinical experience are essential to establish a standardized guideline to improve the management and clinical outcome of this condition.

The gut-brain axis is a bidirectional communication pathway connecting the central nervous system and gastrointestinal tract,playing a key role in the occurrence and development of diseases related to this axis.The vermiform appendix,as a part of the gut that is connected to the cecum,has a unique anatomical location,a rich microbiome,and abundant immune cells.Appendicitis and appendectomy have been found to be associated with the development of diseases related to the gut-brain axis.This review first introduces the anatomy and functions of the vermiform appendix and then expounds the associations of appendicitis and appendectomy with diseases related to the gut-brain axis.Furthermore,this review summarizes and prospects the mechanisms of the vermiform appendix in affecting the occurrence and development of diseases related to the gut-brain axis.
Humans ; Appendix/anatomy & histology* ; Brain ; Appendicitis ; Appendectomy/adverse effects* ; Gastrointestinal Microbiome ; Brain-Gut Axis

BACKGROUND

Appendicitis is the most common acute surgical disease in children. Due to a nonspecific presentation and progression of the disease, a significantly higher presentation of appendiceal perforation may be expected in young children. With perforation there is an elevated risk of intraabdominal abscess, wound infection, post-operative ileus, higher rates of readmission and longer length of stay. Laparoscopic appendectomy is the recommended first line treatment however many centers from developing countries are still in the early stages of adopting such an approach and do appendectomies in an open manner. This study outlines our institution’s experience with a laparoscopy-first approach in managing pediatric appendicitis. Surgical outcomes from laparoscopic and open procedures during the study period will be compared.

This retrospective cohort analysis encompasses all pediatric appendicitis cases at our institution from 2022 to 2023. As a major pediatric surgery referral center, there were a total of 273 cases during that period. Patient records were reviewed for surgical approach and outcomes.

The mean patient age was 11.87 years with a male:female ratio of 1.84. Average duration of symptoms prior to consult was 2.47 days. Most of the patients had complicated appendicitis (57.8% ruptured, 10.2% gangrenous). For the surgical approach, 42.9% underwent open appendectomy (OA) and 57.1% had LA with a conversion rate of 7.14%. Irrespective of disease severity, LA was superior to OA in terms of time to resume feeding (2.84 vs 4.07 days), post-op length of stay (5.29 vs 6.95 days), and surgical site infection rate (3.3% vs 16.2%). Operative times were not statistically different, with cases performed by fellows being faster than their resident counterparts by a few minutes. Other morbidities for LA included intraabdominal abscess (1.9%) and postoperative adhesions requiring adhesiolysis (1.3%), while the OA group reported 1 case each for adhesions, intraabdominal abscess, and incisional hernia.

This study highlights the advantages and complications of laparoscopic appendectomy in the pediatric population as implemented in a tertiary government center. It also provides preliminary data on a significant cohort of patients with complicated appendicitis who underwent laparoscopic management in the local setting.

Objective: The objective of the study is to determine the survival rate, recurrence rate, and complication rate among patients diagnosed with borderline and malignant mucinous ovarian tumor (MOT) who underwent complete surgical staging with appendectomy. Methodology: Eligibility criteria – A search of published literature was conducted in the electronic databases of MEDLINE (PubMed), Cochrane, and Google Scholar through 2000–2022, using a search strategy based on the PIO framework. Information of sources – The citations were identified with the use of a combination of the following text words: “mucinous ovarian tumors,” “MOT,” “appendectomy,” and “pseudomyxoma peritonei.” All retrospective studies with histopathologic diagnosis of borderline or malignant MOTs with patients who underwent appendectomy during primary surgery, including encompassing data on survival rate, recurrence rate, and/or incidence of complications (postoperative infections, appendectomy site leakage, hemorrhage, abscess, peritonitis, bowel perforation, and intestinal obstruction) that matched the terms set by the researchers were retrieved. Risk of bias – For the methodological quality of the individual clinical trials, the Jadad scale was used, which is based on the three following subscales: randomization (2, 1, or 0), blinding (2, 1, or 0), and dropouts/withdrawals (1 or 0). Guidelines for Cochrane collaboration were used to assess the risk bias. Synthesis of results – Review Manager version 5.3 (RevMan 5.4.1) was used by the researcher to perform the systematic review and meta-analysis of included studies. Results: There were eight retrospective studies included in this study. The random interval for survival rate is 64.9%–99.7% with a P < 0.1. The prediction interval for recurrence rate is 0%–100% with 95% confidence interval. The odds of complications occurring are <0.69–2.99 times with 95% confidence interval, with mean effect size is 0.083, and with a 95% confidence interval is 0.027–0.23. Conclusion The mean prevalence of abnormal histology of the appendix in patients diagnosed with borderline and malignant MOTs and underwent appendectomy during primary surgery is 3%–13%. There is no statistically significant difference in survival rate of patients who were diagnosed with borderline and malignant MOTs with or without appendectomy during primary surgery. The prediction interval for recurrence rate is 0%–100% with 95% confidence interval. There is no significant difference between the rate of complications in patients who underwent appendectomy and those without.
Appendectomy

INTRODUCTION: This study aimed to investigate the ultrasonographic features of paediatric acute appendicitis and incorporate them into a scoring algorithm that will quantify the risk of complications and the strength of recommendation for surgical intervention. METHODS: 179 patients with suspected appendicitis who had undergone ultrasonographic examination were included in this study. Based on their medical evaluation and post-surgical histopathological results, patients were categorised into confirmed appendicitis (n = 101) and non-appendicitis (n = 78) groups. RESULTS: In the appendicitis group, the appendix was visualised in 66 (65.3%) patients. In cases where the appendix was not visualised, we looked out for secondary inflammatory signs, which were present in 32 (31.7%) patients. Using stepwise logistic regression, Blumberg's sign, free fluid or collection, hyperaemia, non-compressible appendix and an appendix diameter > 7 mm were found to be significant predictive factors for appendicitis. A new scoring system called POPs was developed, combining inflammatory predictors and ultrasonography findings, with an area under the receiver operating characteristic curve of 0.958 (95% confidence interval 0.929-0.986). CONCLUSION The newly developed POPs-based diagnosis scheme proved a promising alternative to existing scoring systems such as the Alvarado score. Although further calibration would be beneficial, the proposed scoring scheme is simple and easy to understand, memorise and apply in the emergency room.
Acute Disease ; Appendectomy ; Appendicitis/surgery* ; Appendix/surgery* ; Child ; Humans ; Sensitivity and Specificity ; Ultrasonography/methods*

Background: Guillain-Barre syndrome (GBS) is an acute monophasic paralyzing illness that typically occurs after gastroenteritis and respiratory tract infection. Antecedent surgical procedures are less recognized trigger of GBS. Objectives: This paper aims to report a case of demyelinating variety of GBS that developed after appendectomy. Methods: This is a case of a 39-year-old Filipino male who was admitted due to acute appendicitis. He developed lower extremity weakness 4 days after appendectomy. His motor deficit initially presented distally from lower extremities, which advanced to the trunk, upper extremities, and muscles of speech and deglutition. Paresthesia of the fingers and toes and distal areflexia on both lower extremities were also elicited. Results: Diagnosis was done clinically. Nerve conduction study showed demyelinating variant, uncommon for a post traumatic GBS. Supportive care was rendered which resulted in complete recovery. Conclusion Surgery is a known but less identified cause of GBS. Although rare, we should consider GBS in patients presenting with ascending or progressive weakness after recent surgery because its early identification renders immediate and appropriate treatment.
Guillain-Barre Syndrome ; Guillain-Barre Syndrome ; Appendectomy

Objective: To investigate the clinicopathological features, surgical methods and prognosis of primary appendiceal neoplasms. Methods: A descriptive case series study was performed. Clinical data of patients diagnosed with primary appendiceal neoplasms in Peking University First Hospital from 2006 to 2017 were retrospectively analyzed. Patients who underwent surgery and were confirmed as appendiceal neoplasms by postoperative pathology were included. Cases of cecal tumor invading the appendix and other organ tumors implanting in the appendix and cases of recurrent appendix tumors were excluded Pathological classification was based on the 4th edition of the WHO classification of digestive tract tumors (2010 edition), and the efficacy of operation methods of low grade appendiceal mucinous neoplasm (LAMN) were analyzed. Results: A total of 115 patients were enrolled, including 52 males and 63 females with a median age of 59 (51, 71) years. Clinical symptoms usually manifested as dormant pain in the right lower quadrant, migrating right lower abdominal pain, fever and bloating. Twenty-four cases were accidentally discovered during surgery, and 21 cases were found by physical examination. The preoperative diagnosis rate of CT and ultrasound was 40.2% (43/107) and 25.5% (24/94) respectively. The postoperative pathological types contained 83 cases of LAMN, 12 cases of mucinous adenocarcinoma, 9 cases of appendiceal neuroendocrine neoplasms (aNEN), 2 cases of mucinous adenocarcinoma with signet ring cells, 3 cases of serrated adenoma, 2 cases of goblet cell carcinoid, 2 cases of lymphoma, 1 case of leiomyoma and 1 case of schwannomas. All the patients underwent surgical resection, including 41 cases of appendectomy, 21 cases of partial cecectomy, 48 cases of right hemicolectomy, and 5 cases of combined organ resection due to appendiceal tumor infiltration or dissemination. Eighteen cases were diagnosed with pseudomyxoma peritonei (PMP) during operation. A total of 98 patients were enrolled for follow-up. The median follow-up time was 58 (5-172) months. The 5-year disease-free survival (DFS) rate was 84.5% and 5-year overall survival (OS) was 88.2%. Multivariate analysis revealed that high-grade malignancy tumors (HR=25.881, 95% CI: 2.827-236.935, P=0.004) and PMP formation (HR=42.166, 95% CI: 3.470-512.439,P=0.003) were independent risk factors for prognosis. Patients undergoing right hemicolectomy presented longer operation time, more blood loss and higher morbidity of complication as compared to those undergoing appendectomy and partial cecectomy (all P<0.05), while no significant differences in 5-year DFS (P=0.627) and 5-year OS (P=0.718) were found. Conclusions: Primary appendiceal neoplasms usually have no typical features, accompanied with low preoperative diagnosis rate. The common pathological types are LAMN, mucinous adenocarcinoma and aNEN. Appendectomy or partial cecectomy for LAMN may achieve satisfactory prognosis. High-grade malignancy tumors and PMP formation are independent risk factors for prognosis.
Adenocarcinoma, Mucinous/surgery* ; Appendectomy ; Appendiceal Neoplasms/surgery* ; Humans ; Male ; Neoplasm Recurrence, Local ; Retrospective Studies

OBJECTIVE: To compare the efficacy of short-course versus longcourse antibiotic therapy among patients undergoing appendectomy for complicated appendicitis. METHODS: The authors conducted an electronic search of PubMed, Cochrane Library, and EBSCOHost for studies from 2000 to January, 2000 to September, 2018 comparing short-course versus long-course antibiotic therapy in adults undergoing appendectomy for complicated appendicitis. The outcomes considered were the incidence of superficial surgical site infection and intra-abdominal abscess, and duration of hospital stay. Meta-analysis was performed using Review Manager software. RESULTS: A total of 360 patients in two studies were analyzed. Superficial surgical site infection was identified in 5 out of 123 patients in the short-course antibiotic group (4%), and 5 out of 237 patients in the long-course antibiotic group (2.1%) (95% CI 0.38, 5.51, p=0.58). There was a decrease in the incidence of intra-abdominal abscess in the short-course antibiotic group (6.5%), but the difference was not statistically significant (95% CI 0.32, 1.77, p=0.52). The duration of hospital stay was significantly less in the short-course antibiotic group (3.95 days) compared to the long-course antibiotic group (4.6 days) (95% CI -0.66, -0.21; p<0.001). CONCLUSION No difference between the <5-day and ≥5-day antibiotic course in terms of surgical site infection and intra-abdominal abscess was detected. However, the hospital stay of the <5-day group was shorter.
Appendectomy

OBJECTIVE: To survey care providers' preference between structured reporting (SR) and free-text reporting (FTR) for appendiceal computed tomography (CT) in adolescents and young adults. MATERIALS AND METHODS: An ethical committee approved this prospective study. The requirement for participant consent was waived. We distributed the Likert scale-based SR form delivering the likelihood of appendicitis across 20 hospitals through a large clinical trial. In the final phase of the trial, we invited 706 potential care providers to participate in an online survey. The survey questions included usefulness in patient management, communicating the likelihood of appendicitis, convenience, style and format, and overall preference. Logistic regression analysis was performed for the overall preference. Three months after the completion of the trial, we checked if the use of the SR was sustained. RESULTS: Responses were analyzed from 594 participants (175 attendings and 419 trainees; 225 radiologists, 207 emergency physicians, and 162 surgeons). For each question, 47.3–64.8% of the participants preferred SR, 13.1–32.7% preferred FTR, and the remaining had no preference. The overall preference varied considerably across the hospitals, but slightly across the departments or job positions. The overall preference for SR over FTR was significantly associated with attendings, SR experience for appendiceal CT, hospitals with small appendectomy volume, and hospitals enrolling more patients in the trial. Five hospitals continued using the SR in usual care after the trial. CONCLUSION: Overall, the care providers preferred SR to FTR. Further investigation into the sustained use of the SR is needed.
Adolescent ; Appendectomy ; Appendicitis ; Emergencies ; Humans ; Logistic Models ; Prospective Studies ; Radiology Information Systems ; Surgeons ; Young Adult

Acute appendicitis is the most common indication for emergency abdominal surgery worldwide. The risks and benefits of incidental appendectomy during other operations have been debated for over a century. There is no right answer to the question of whether or not to perform incidental appendectomy. Although there are only a few indications where it is explicitly recommended such as in gynecological surgery, malrotation, and Ladd's procedure, incidental appendectomy is cost-effective in selected patient groups, especially in the young, without an increase in morbidity and mortality. In this review, the literature on incidental appendectomy was assessed from several perspectives.
Adolescent ; Appendectomy ; Appendicitis ; Costs and Cost Analysis ; Emergencies ; Female ; Gynecologic Surgical Procedures ; Humans ; Mortality ; Risk Assessment