FIGURE 5.

Direct comparison of segmentation anomalies. (a) Lumbarization of the first sacral vertebra and associated sacralization of the first coccygeal element. (b) Sacralization of the fifth lumbar vertebra. Blue, lumbar spine, yellow, sacral vertebrae, and orange, coccyx. The red lines indicate the trajectories of the iliac crest (1) and the linea terminalis (2). (c–f) Superimposition of the two specimens presented in (a) and (b), showing the morphological difference associated with the segmentation anomalies (yellow, lumbarization, blue, sacralization) in anterior (c), posterior (d), superior (e), and lateral (f) view