Imaging of Bertolotti Syndrome

Bertolotti syndrome is a congenital spinal anomaly characterized by an abnormal enlargement of one or both transverse processes (mega-apophysis) of the most caudal lumbar vertebrae that articles or fuses with the sacrum and/or iliac bone resulting in a pseudo-articulation. This is often a factor that is not addressed in the evaluation and treatment of low back pain. The presence of a lumbosacral transitional vertebra is a common finding in the general population with a prevalence between 4 and 30%. However, Bertolotti syndrome should be considered a differential diagnosis of low back pain. The pathophysiology, epidemiology and treatment should be the subject of general knowledge of physicians who often treat this disease.