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- W1993926705 abstract "A 73-year-old woman presented to the emergency department complaining of neck swelling and malaise for 1 day. Her past medical history was noncontributory except for a diagnostic colonoscopy performed 3 days before to investigate disturbed bowel habit. She had been under observation for 24 hours, and because no specific diagnoses were made, an evaluation from the surgical team was requested. The colonoscopy report revealed that a rectal polypectomy had been performed and was complicated by bleeding, controlled using an endoclip (Figure 1). Physical examination showed bilateral neck emphysema with crepitus. Abdominal pain without signs of peritoneal irritation was located mainly on the left iliac fossa. White cell count and C-reactive protein levels were within normal limits. Chest and abdominal radiographs demonstrated pneumomediastinum and pneumoretroperitoneum (Figure 1). In view of the clinical findings (patient's good general condition, hemodynamic stability, absence of peritoneal irritation signs or inflammatory syndrome), she was managed conservatively (bowel rest, intravenous fluids, broad-spectrum intravenous antibiotics). She recovered uneventfully and was discharged on the tenth day after admission. There are reports on the safety and cost-effectiveness of colonoscopy, but complications (e.g., bleeding and perforation) cannot be overlooked.1-3 Although colonoscopic perforation is rarely reported, it is associated with high morbidity and mortality.1, 2 Causes of perforation (excessive air insufflation, instrumental trauma, improper use of electrocautery) and risk factors for perforation (advanced age; medical comorbidity; therapeutic procedures such as polypectomy, pneumatic dilation, and endoscopic mucosal resection) have been described.1-3 Most perforations occur in the sigmoid colon1, 2 and less frequently in the rectum.4 Colonoscopic perforation can be intraperitoneal or extraperitoneal. Extraperitoneal colonoscopic perforation is most likely to occur in the lower rectum (usually below the middle valve of Houston),5 as reported here. Clinically, individuals with colonoscopic perforation could present with symptoms and signs of peritonitis (mainly abdominal pain and tenderness).1 As in the current report, extraperitoneal perforation can be present in the absence of peritonitis.6-9 More rarely, perforation can result in the presence of free air in soft tissue planes.10 Retroperitoneal air results from direct extraperitoneal colonic perforation or from dissection of air through the colonic wall (pneumatosis coli) and subsequent passage along the mesentery to the retroperitoneum.10 Once in the retroperitoneum, air may travel along the fascial planes to enter the mediastinum and the subcutaneous.10 The elderly woman was diagnosed with a rectal perforation accompanied by pneumomediastinum, pneumoretroperitoneum, and subcutaneous emphysema. Although there are cases in elderly people,10 according to a comprehensive literature review (Medline and Embase databases), to the best of the knowledge of the authors, this is one of the few reports of extraperitoneal rectal colonoscopic perforation in an elderly adult who was successfully treated conservatively.6-9 Although perforations usually occur during colonoscopic examination or within 24 hours after the procedure, delayed colorectal perforation has been reported.1 In the current report, the first symptoms appeared just 48 hours postcolonoscopy. Postpolypectomy perforations result from thermal injury of the submucosa and can progress to transmural lesions over time.2, 4 Because the fat tissue of the mesentery or omentum encapsulates the lesion, such lesions are smaller, have less peritoneal effect, and are diagnosed later and are therefore more susceptible to a conservative approach.2, 4 Colonoscopic perforation is usually diagnosed in the emergency department,2 and promptness of diagnosis is the main prognostic factor of postcolonoscopic perforation.3 In the current report, there was a delay of 24 hours before the correct diagnosis was made because there was lack of an appropriate diagnostic examination. To avoid this, emergency physicians should suspect a colonoscopic perforation if an individual has fever, abdominal pain, or distention after colonoscopic examination, even if the individual presents these symptoms several days after the procedure.1, 4 When perforation is suspected, a plain roentgenogram of the abdomen should be taken to exclude extra- or intraperitoneal air.1 The management of colonoscopic perforations remains controversial, because there are no specific guidelines.1, 2, 4 Historically, surgery was the mainstay of treatment for the majority of patients,1, 2, 4 but the likelihood of nonsurgical treatment has increased.2, 4 Conservative management (intravenous fluids, absolute bowel rest, and broad-spectrum intravenous antibiotics) should be reserved for individuals with good general health, no signs of diffuse peritonitis, perforation unnoticed by the endoscopist, proper colonic preparation, and perforation produced by a different mechanism of pressure and traction maneuvers, as in the current report.1, 2, 4 If conservative treatment is successful, the individual's clinical appearance should improve gradually within 24 to 48 hours,1 but when pain worsens, or a systemic inflammatory response such as fever occurs, prompt surgical treatment should be considered.1, 4 Conflict of Interest: The editor in chief has reviewed the conflict of interest checklist provided by the authors and has determined that the authors have no financial or any other kind of personal conflicts with this paper. Author Contributions: Rafael Denadai: concept, intellectual and scientific content of the study and manuscript writing. Ciro Carneiro Medeiros: collection of data. Antonio F. Carvalho Jr: analysis and interpretation of data. Carlos Alberto Salomão Muraro: manuscript writing and critical revision. Sponsor's Role: None." @default.
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- W1993926705 date "2013-08-01" @default.
- W1993926705 modified "2023-09-26" @default.
- W1993926705 title "Rectal Perforation After Colonoscopic Polypectomy Presented As Subcutaneous Emphysema, Pneumomediastinum and Pneumoretroperitoneum Successfully Treated Conservatively in an Elderly Adult" @default.
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- W1993926705 doi "https://doi.org/10.1111/jgs.12374" @default.
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