INTESTINAL OBSTRUCTION CAUSED BY APPENDICITIS: A SYSTEMATIC REVIEW

The known complications of appendicitis include perforated appendicitis with generalised peritonitis, appendiceal mass, appendiceal abscess, sepsis, adhesion formation and in a few occasions, small bowel intestinal obstruction.

To review published cases of intestinal obstruction due to appendicitis with a view to better understand the pathophysiology of this complication.

A search of the literature in the MEDLINE database, using PubMed and OvidSP, Scopus, Google Scholar and Cochrane Databases with the following MeSH terms: (Appendicitis or appendiceal mass, appendiceal abscess or appendiceal adhesion band) and (intestinal obstruction, intestinal herniation, intestinal strangulation, intestinal knotting and paralytic ileus) was done. Also, these searches were restricted according to the following MeSH limits: (a) January 1, 1950 to July 31, 2016, (b) English articles (c) Human.

Overall, 27 articles reported 45 patients with intestinal obstruction due to appendicitis. Of the 30 (66.7%) patients that the gender was indicated, 22 (48.9%) were male while 8 (17.8%) were female. In 38 (84.4%) cases the cause was mechanical obstruction resulting from one or a combination of the following: (a) appendix laid across loops of bowel bound down by adhesions, (b) herniation through a ring or gap formed by the appendix tip being attached to its base, (c) appendix tip attached to the bowel causing a torsion, (d) kinking of the bowel, (e) complex knotting. Pre-operative diagnosis was a major challenge and so, none was approached through incision based on the McBurney's point.The outcome of treatment which was mostly achieved by immediate appendectomy followed by adhesiolysis was sufficient and often gave good results.

This study has shown that appendicitis is an important cause of intestinal obstruction. Even though pre-operative diagnosis is still a major challenge, clinical evaluation and a high index of suspicion are key to diagnosis.