What is a lumbar spondylolisthesis? There are five lumbar vertebrae, which are neatly aligned with each other. The lumbar vertebrae are straight from the front, and when viewed from the side, the lumbar vertebrae show a forward harmonious curve. In some cases, there is a “misalignment” between the lumbar vertebrae, where the upper vertebrae appear displaced forward on the lower vertebrae when viewed from the side on an x-ray. We refer to this movement and misalignment between the lumbar vertebrae as “lumbar spondylolisthesis”. Lumbar spine slippage is usually anterior slippage. What are the manifestations of lumbar spondylolisthesis? 1. Many patients with lumbar spondylolisthesis may not have obvious symptoms in the early stage. 2.Some manifest in diffuse pain in the lower back. 3.Some present with stiffness in the lower back. As well as tension in the N cord muscle (behind the knee) at the back of the lower extremity. 4.Patients with more severe slippage may experience depression of the lower back, anterior convexity of the abdomen, and even shortening of the trunk and swaying when walking. 5.If the slippage is aggravated and causes narrowing of the spinal canal, symptoms of nerve compression may occur. For example, pain in the lower leg, the need to rest when walking a certain distance (hundreds of meters) (intermittent claudication), etc. may occur.