Situs inversus is a genetic condition in which the major visceral organs are reversed or mirrored from their normal positions. In this condition, the organs in the chest and abdomen are positioned in a mirror image from their normal positions. For example, the left atrium of the heart and the left lung are positioned on the body‚Äôs right side. In the abdominal cavity, the liver is positioned mostly on the left side instead of the right. And the stomach is on the right side of the body instead of the left.
Situs inversus totalis is a combination of situs inversus with dextrocardia. It involves complete transposition of all of the viscera including the heart. Situs inversus is a very rare condition. and occurs in an estimated one in 10,000 people. It is caused by an autosomal recessive genetic condition. An unaffected carrier mother and an unaffected carrier father have a 1 in 4 chance of having a child with situs inversus. Because many genetic steps would have to come together to cause situs inversus, the condition is rare.
Dextrocardia is a congenital condition in which the apex of the heart is located on the right side of the body. Commonly called the right sided heart.