Herniated disks in the lumbar spine are common in adults, ... This malformation also affected the rate of L4/L5 versus L5/S1 herniation, depending on the location of the transitional vertebra.

Lumbosacral transitional vertebrae (LTV) manifest as one or several abnormal vertebrae in the lumbosacral spine. The transitional vertebrae bear the characteristics of both lumbar and sacral vertebrae ...