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. Author manuscript; available in PMC: 2015 Nov 1.
Published in final edited form as: J Manipulative Physiol Ther. 2014 Nov 1;37(9):678–687. doi: 10.1016/j.jmpt.2014.10.003

Figure 3.

Figure 3

Lumbosacral transitional vertebrae (Castellvi Classification)

Left: Type IA, circle showing unilateral dysplastic (enlarged) transverse process. Center: Type IIA, arrow showing unilateral dysplastic transverse process with accessory joint. Right: Type III a, arrows showing unilateral dysplastic transverse process with bony union. Type IV or mixed (not shown) is classified as type II and type III on opposite sides. (Bilateral presentations of types I–III are designated with the letter b)