Abstract
Colonic Diverticular Disease (CDD) is a multifactorial inflammatory disease. Acute diverticulitis (AD), with extraluminal free air (both pericolic and distant), represents about 15% of radiological scenarios and remains a therapeutic challenge for surgeons. Currently, the WSES guidelines suggest trying a conservative strategy both in the presence of pericolic and distant free extraluminal air, even if both have respectively weak recommendation based on low/very low-quality evidence. We performed a systematic review following the Preferred Reporting Items for Systematic Reviews and Meta-Analyzes guidelines. PubMed/MEDLINE, Scopus, Web of Science, and Embase databases were used to identify articles of interest. A total of 2380 patients with AD and extraluminal free air (both pericolic and distant) who underwent nonoperative management (NOM) were analyzed. Of the 2380 patients, 2095(88%) were successfully treated with NOM, while 285 (12%) patients failed. A total of 1574 (93.1%) patients with pericolic extraluminal free air had a successful NOM with 6.9% (117) failure rates, while 135 (71.1%) patients with distant extraluminal free air had a successful NOM with 28.9% (55) failure rates. Regarding distant recurrence, we recorded a rate of 18.3% (261/1430), while a rate of 11.3% (167/1472) was recorded for patients undergoing elective surgery. NOM for patients with AD and extraluminal free air (both pericolic and distant) seems to be feasible and safe despite a higher failure rate in the distant subgroup, which remains the most challenging clinical scenario to deal with through conservative treatment.
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