Situs inversus is a condition in which the organs of the chest and the abdomen are arranged in a perfect mirror image reversal of the normal positioning.
Normal human development results in a asymmetrical arrangement of the organs within the chest and the abdomen.
Typically the heart and the spleen lies on the left side of the body, the liver is on the right side and the lungs on the left has two lobes while the lungs on the right has three lobes.
This normal arrangement is known as situs solitus. However, in some people the organs of the chest and the abdomen are arranged at the exact opposite position, the heart is on the right as is the two lobed lung and the liver and three lobed lung on the left.
The relationship between the organ is not changed, so functional problems rarely occur.
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