Bertolotti syndrome is a congenital disorder when there is a lumbosacral transitional vertebra with an enlarged transverse process, articulation with the sacrum, in the presence of low back pain.

If it is right-sided, the clinical features can mimic either appendicitis or Crohn's disease. In this case, there are no CT signs of appendicitis or Crohn's disease. After the injection, the pain relief confirmed the diagnosis of Bertolotti syndrome.