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A case of L6 vertebra with type IIa transition. Left, T2-weighted sagittal cervicothoracic and (right) lumbar images in the cross-referencing mode of the picture archiving and communication system. This simultaneously demonstrates the marker at the T12–L1 disc space. Counting the vertebral levels caudally from C2 reveals this patient to have 25 presacral vertebrae or 6 lumbar vertebrae.5
