Bertolotti syndrome

Case contributed by Ammar Haouimi
Diagnosis almost certain


Chronic low back pain.

Patient Data

Age: 35 years
Gender: Male

The MRI images demonstrate a lumbosacral transitional vertebra (LSTV) seen as a right mega transverse process of L5 with pseudo-articulation with the sacrum.

Case Discussion

The presence of a lumbosacral transitional vertebra (LSTV) in a patient with low back pain is suggestive of Bertolotti syndrome, however, this syndrome remains controversial.

According to the Castellvi classification of lumbosacral transitional vertebrae, this case is classified type IIa. 

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