has part has part occurs in occurs in characteristic of inheres in has modifier ossification Abnormal sternum morphology Abnormal enchondral ossification Abnormal sternal ossification 2012-05-27T04:08:55Z Abnormal maturation of breastbone Sternal ossification centre abnormalities HP:0011863 UMLS:C1860243 Any anomaly in the formation of the bony substance of the sternum. Sternal ossification center abnormalities The sternum develops from two cartilaginous bars, situated one on either side of the median plane and connected with the cartilages of the upper nine ribs of its own side. During development, the two cartilaginous bars fuse with each other to form the cartilaginous sternum. This in turn is ossified from six centers: one in the manubrium, four in the body of the sternum, and one in the xiphoid process. HP:0006624 quality abnormal sternum