Abnormality of abdominal situs Abdominal situs ambiguus 2017-09-29T22:56:16Z Fyler:3817 An abnormality in which the abdominal organs are positioned in such a way with respect to each other and the left-right axis as to be not clearly lateralised and thus have neither the usual, or normal (situs solitus), nor the mirror-imaged (situs inversus) arrangements.