ReviewWorld journal of surgery2018
Appendiceal Duplication: A Comprehensive Review of Published Cases and Clinical Recommendations.
Review in World journal of surgery, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 1 of them a synthesis that pooled it.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
25 citing papers in PubMed, 1 synthesis or guideline pooled it, 49 citations in OpenAlex.
- Anatomical Variations of the Vermiform Appendix.Acta medica academica · 2024Pooled it
- Partial appendiceal duplication with double bases converging into a single body and tip: a first reported case from Nepal.Annals of medicine and surgery (2012) · 2026Article
- Diagnostic Challenge of Sequential Appendicitis in a Patient With Appendiceal Duplication: A Case Report.The American journal of case reports · 2026Article
- Mesenteric origin hyalinized vascular pseudotumor mimicking duplicate acute appendicitis.Anales del sistema sanitario de Navarra · 2025Article
- Duplicated Appendix With Appendicitis and Appendicolith: A Case Report of a Rare Clinical Encounter.Cureus · 2025Article
- A rare case of congenital appendiceal duplication complicated by an appendiceal-sigmoid fistula: A case report.International journal of surgery case reports · 2025Article
- Horseshoe appendix: A case report and literature review.Medicine · 2025Review
- Perforated anterior tenia coli-type appendicitis in a case of vermiform appendix duplex in a toddler: a case report.Journal of surgical case reports · 2024Article
- Atypical Duplex appendix arising from the ascending colon: a case report.Journal of medical case reports · 2024Article
- Appendiceal duplication an unusual cause of abdominal pain: A case report.Clinical case reports · 2023Article
- Case report: Acute appendicitis in appendix duplication.International journal of surgery case reports · 2023Article
- Duplication of the appendix masquerading as appendiceal tumor: a case report.Surgical case reports · 2023Article
- Appendiceal atresia causing recurrent right lower quadrant pain without inflammation.Clinical journal of gastroenterology · 2023Article
- Case report: Duplicated appendicitis with history of cloacal exstrophy causing bowel obstruction.International journal of surgery case reports · 2023Article
- Acute appendicitis with appendix duplicity in Eritrea: A case report.Clinical case reports · 2022Article
- Autoamputation of the appendix and survival of the amputated part: a rare case report and literature review.BMC surgery · 2022Review
- Recurrent appendicitis of vermiform appendix after a prior appendectomy: A case report and review of the literature.Annals of medicine and surgery (2012) · 2022Article
- Double appendixes: A rare case report.Clinical case reports · 2022Article
- First case report of horseshoe appendix in Morocco according according to SCARE guidelines.Annals of medicine and surgery (2012) · 2021Article
- A case report of complete appendiceal duplication on the normal site of a single caecum: A new variant?International journal of surgery case reports · 2020Article
Corrections and comments
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Authors and funding
4 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundDuplex appendix is very rare (incidence 0.004%) but has clinical relevance given the frequency of appendicectomies performed. Failure to recognise duplication can result in failure of treatment and medico-legal consequences. A review of published cases was undertaken to identify factors that may help in managing this rare condition.
methodsAll English and non-English publications were identified in PubMed, Embase and Cochrane databases. Patient demographics, intraoperative findings, anatomical details and histopathology were analysed.
resultsA total of 141 cases were identified [male/female ratio 1.4:1, median age 20 years (range foetus to 69 years)]. Duplication of the appendix ranges from branching of the appendix trunk to a fully matured appendix located elsewhere along the colon. Most can be categorised by the Cave-Wallbridge classification. There were 22 Type A, 8 Type B1, 46 Type B2 and 10 Type C cases (Cave-Wallbridge). There were six cases of horseshoe and two cases of triple appendix. Six reports gave anatomical descriptions that could not be classified by Cave-Wallbridge categories and in 11 cases there were no anatomical descriptions.
conclusionsAn anteriorly placed appendix, away from the convergence of the taenia, or a normal appendix in the presence of convincing clinical or radiological signs of appendicitis should instigate a careful examination of the caecal pole and possible exploration of the retrocaecal space for appendiceal duplication. If the patient had previous surgery for congenital abnormalities, Type B1 or Type C duplication should be considered.
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