《Table 2 Geographical distribution of cases》

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《Congenital peritoneal encapsulation: A review and novel classification system》

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An electronic，systematic search of the literature was performed using several databases，including Medline，PubMED，Scopus and Google Scholar（Figure 1）.The search was not limited by English language restriction or by date of publication.The following search terms were used as keywords:“Peritoneal Encapsulation”，“Congenital Peritoneal Encapsulation”and“Abdominal Cocoon”.The electronic search was augmented by means of manual searches of the reference lists of the selected publications.Article titles and abstracts were reviewed independently by two investigators for relevance to CPE.A significant volume of the literature reported cases of the more common abdominal cocoon or EPS，and these were excluded.Most cases of CPE could be identified and included through the abstract alone.If further clarification was required，clinical information，histopathology and photographs were used to determine cases.Full manuscripts of articles were read thoroughly and independently by two investigators，and information was extracted，including age，sex，past medical history，clinical information，diagnostic studies，management，histopathology and follow-up status.In two case reports[2，3]full articles could not be found either by contacting the journal or the relevant authors.In these cases，the abstracts alone were used to gather information.In total，42 reports[1-42]describing 45separate cases of CPE were found and collated.Table 1 demonstrates the key demographic and clinical information obtained from the cases.