has part has part characteristic of inheres in has modifier Abnormality of the costochondral junction Irregular chondrocostal junctions Irregular surface of the normally relatively smooth border between the distal part of the ribs and the costal cartilages, which are bars of hyaline cartilage that connect the ribs to the sternum. HP:0006606 HP:0006658 Irregular costochondral margins The first seven pairs of ribs are connected with the sternum; the next three ribs are each articulated with the lower border of the cartilage of the preceding rib; the last two ribs have pointed extremities, which do not connect with the sternum. UMLS:C1861199 abnormal irregular density costochondral joint