Type VI spondylolisthesis is best described as which etiologic category?

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Type VI spondylolisthesis is iatrogenic in origin—the slip is caused by medical intervention rather than a primary spinal disease, injury, or natural degenerative process. In this framing, the surgeon’s actions or the consequences of a procedure (such as changes after decompression or fusion, instrumentation-related issues, or adjacent-segment degeneration) initiate the listhesis. This distinguishes it from congenital/dysplastic origins, isthmic pars fractures, degenerative changes due to aging, or traumatic fractures, which are not linked to a physician-induced procedure.