Appendicitis

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Appendicitis is a condition characterized by inflammation of the appendix. It is classified as a medical emergency and many cases require removal of the inflamed appendix, either by laparotomy or laparoscopy. Untreated, mortality is high, mainly because of the risk of rupture leading to peritonitis and shock. Reginald Fitz first described acute and chronic appendicitis in 1886, and it has been recognized as one of the most common causes of severe acute abdominal pain worldwide. A correctly diagnosed non-acute form of appendicitis is known as "rumbling appendicitis".


The term "pseudoappendicitis" is used to describe a condition mimicking appendicitis. It can be associated with Yersinia enterocolitica.

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Signs and symptoms



Location of the appendix in the digestive system




For the most part, symptoms are related to disturbed bowel functions. Pain first, vomiting next and fever last has been described as classic presentation of acute appendicitis. Pain starts mid abdomen, and except in children below 3 years, tends to localize in right iliac fossa in a few hours. This pain can be elicited through various signs. Signs include localized findings in the right iliac fossa. The abdominal wall becomes very sensitive to gentle pressure (palpation). Also, there is severe pain on suddenly releasing a deep pressure in lower abdomen (rebound tenderness). In case of a retrocecal appendix, however, even deep pressure in the right lower quadrant may fail to elicit tenderness (silent appendix), the reason being that the cecum, distended with gas, prevents the pressure exerted by the palpating hand from reaching the inflamed appendix. Similarly, if the appendix lies entirely within the pelvis, there is usually complete absence of the abdominal rigidity. In such cases, a digital rectal examination elicits tenderness in the rectovesical pouch. Coughing causes point tenderness in this area (McBurney's point) and this is the least painful way to localize the inflamed appendix. If the abdomen on palpation is also involuntarily guarded (rigid), there should be a strong suspicion of peritonitis requiring urgent surgical intervention.


Not typical Pain is usually not typical in some patients, who may just only have lower right abdominal pain no mid-upper abdominal pain at the beginning. Often, the pain is not prominent in the elderly or children below 3-year-old. Or the pain point moves to other locations, especially just below the liver in pregnant woman. In this case, the inflamed appendix is pushed up by enlarged uterus.


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