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The lumbosacral joint is a joint of the body, between the last lumbar vertebra and the first sacral segment of the vertebral column. In some ways, calling it a "joint" (singular) is a misnomer, since the lumbosacral junction includes a disc between the lower lumbar vertebral body and the uppermost sacral vertebral body, as well as two lumbosacral facet joints (right and left zygapophysial joints).

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