[Dysontogenetic blockbuilding of the vertebrae at the lumbo dorsal junction]

It is reported in two cases of synostosis of the vertebral which is related in the Medical literature as "Dysontogenetic blockbuilding of the Corpus Vertebrae". This condition could be seen in a 13 year old boy in the area of Th 9 to Th 12 and in a 13 year old girl from Th 11 to L1. The clinical and radiological findings of these two cases will be described and discussed. An attribution of these cases to the "Dysontogenetic blockbuilding" groups was based on a disturbance of the vertebral forming. A causal therapy is not possible.