Numerical variations in human vertebral column: a case report.
Numerical increases in the elements of the vertebral column probably do not occur. In this case, 25 presacral vertebrae (PSV) were determined in the vertebral column of a 22-years-old male skeleton. Their distribution was as follows; 7 cervical, 12 thoracic, 1 thoraco-lumbar, 5 lumbar. Sacrum contained 5 vertebrae. In addition, sacralization or lumbarization was not seen.