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What is bilateral rightsidedness or bilateral leftsidedness?

Someone who has situs ambiguous also can have bilateral leftsidedness or bilateral rightsidedness.

With bilateral rightsidedness, both sides of the body look the way the right side normally appears, causing a condition called asplenia - meaning there is no spleen.

With bilateral leftsidedness, a person has a condition known as polysplenia - meaning he or she has spleens on both sides of the body.

Having no spleen can increase risks of infection. Have two spleens can increase the odds of rupturing a spleen during an accident or on impact, causing risky internal bleeding.

With a spleen or without one, about 90 percent of people with situs ambiguous also have congenital heart disease.

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