Acute Presentation of Lumbar Spinal Stenosis Due to Ossified Ligamentum Flavum: The Possible Role of Spondylolisthesis: A Case Report.

This report is the first to describe a case of an acute nontraumatic presentation of OLF associated with spondylolisthesis. OLF pathogenesis in still unknown, although several factors have been considered. According to the literature, operative treatment has demonstrated to be effective.