Biconcave vertebral bodies Posterior scalloping of vertebral bodies HP:0004572 UMLS:C1850196 HP:0004579 The posterior vertebral scalloping sign appears on a lateral radiograph of the spine as an exaggeration of the normal concavity of the posterior surface of one or more vertebral bodies. Neurofibromatosis may be associated with marked scalloping of the posterior borders of the vertebral bodies resulting from intraspinal tumors. HP:0005121 Posterior vertebral body scalloping An excessive concavity of the posterior surface of one or more vertebral bodies.