| Summary: | AA is a frequent surgical condition that demands urgent intervention. It accounts for approximately 6% of all emergency department visits. Situs inversus is a rare condition in which the orientation of asymmetric organs is a mirror image of normal anatomy. It can be partial (involving either the abdominal or thoracic cavities) or complete (situs inversus totalis: transposition of both abdominal and thoracic organs). SIT is very rare, with an incidence of 1 per 5000 to 10,000 live births. It is inherited in an autosomal recessive pattern with incomplete penetrance. LSAA is very rare and can happen in association with other congenital abnormalities such as situs inversus, midgut malrotation (MM), or a usually long right-sided appendix projecting into the left lower quadrant. SIT is responsible for greater than 67% of left-sided appendicitis cases. Due to atypical clinical presentation, the diagnosis of AA can be difficult and often delayed. Hence, a complete medical history, physical examination, laboratory tests, and imaging tools are necessary to reach a correct diagnosis in a timely manner and prevent complications like abscesses, perforations, and peritonitis.We report a case of a 50-year-old male with symptoms of left lower abdominal pain along with fever, nausea, vomiting, and loose stools that were later diagnosed as LSAA in the setting of SIT.
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