Type VI/Iatrogenic Spondylolisthesis is commonly caused by which factor?

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Iatrogenic means the slip results from something a surgeon did during spine surgery. In Type VI spondylolisthesis, the vertebral body shifts forward because the operation destabilized that spinal segment. This can happen if the pars or facets are damaged during decompression or instrumentation, or if excessive bone removal or misplacement of hardware alters the stability of the motion segment. The slip is therefore a direct consequence of surgical technique, not a birth deformity, a separate traumatic injury, or changes that arise purely from degeneration or fusion complications.