costoxiphoid ligaments costoxiphoid ligaments the costoxiphoid ligaments (chondroxiphoid ligaments) are inconstant strand-like fibrous bands that connect the anterior and posterior surfaces of the seventh costal cartilage, and sometimes those of the sixth, to the front and back of the xiphoid process the sternum. costoxiphoid ligamentssternocostal and interchondral articulations. anterior view.detailsidentifierslatinligamenta costoxiphoideata98a03.3.05.005ta21734fma71397anatomical terminology they vary in length and breadth in different subjects; those on the back of the joint are less distinct than those in front.