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. 2020 Sep 25;85:e550–e574. doi: 10.5114/pjr.2020.99887

Figure 4.

Figure 4

Transitional lumbosacral anatomy – coronal T2W magnetic res- onance image of the lumbosacral junction demonstrates Castellvi type IIa transitional lumbosacral anatomy with left pseudo-articulation between L5 and the sacrum (arrow). This pseudo-articulation may result in focal pain, termed Bertolotti syndrome