Platyspondyly Supernumerary vertebral ossification centers UMLS:C4025309 HP:0004598 Supernumerary vertebral ossification centres Three ossification sites are present in typical vertebral bodies (C3-L5): a single ossification center in the vertebral body, and one each in the two neural arches. This term applies if there are additional vertebral ossification centers present during the development and maturation of the spine. Abnormally ossified vertebrae