Situs Inversus Totalis is a rare condition in which the organs of the body are placed in a mirror-image of the normal positioning. The organs of the chest and abdomen are on the right side of the body instead of normally being on the left.

The heart is located in the right chest in contrast to its usual position in the left. In patients with Situs Inversus Totalis, all of the chest and abdominal organs are reversed. In x-ray tests, these organs will appear in a mirror-image.

This condition is present at birth and occurs once in about every 6,000 to 8,000 births. 

 Source of Picture: http://science.howstuffworks.com/life/human-biology/reversal-of-organ1.htm  This picture shows the normal organ placement specifically compared to the positioning of a person with Situs Inversus Totalis.  

 Source of Picture: http://science.howstuffworks.com/life/human-biology/reversal-of-organ1.htm 

This picture shows the normal organ placement specifically compared to the positioning of a person with Situs Inversus Totalis.