situs inversus (MONDO_0010029, a Monarch Disease Ontology entry) can be described as follows. A congenital condition in which there is complete right-to-left reversal of the position of the major thoracic and abdominal organs (that is, they are arranged in a mirror image of the normal positioning). Also known as: complete situs inversus, complete situs inversus viscerum, complete transposition (morphologic abnormality), laterality sequence, situs inversus totalis, situs inversus totalis (disease).