Definition: a sacrum composed of six segments, the last lumbar vertebra assuming the appearance of a sacral segment; or one that is composed of but four segments, the first sacral being free and having the characteristics of a lumbar vertebra.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.