Research Advances in the Clinical Application of Cauda Equina Redundancy Sign and Cauda Equina Sedimentation Sign for the Diagnosis and Treatment of Lumbar Spinal Stenosis

腰椎管狭窄症是腰椎退变性疾病的常见病和多发病，是导致腰腿痛的常见病因之一。腰椎管狭窄症的治疗分为保守治疗和手术治疗。腰椎管狭窄症的诊断综合性强，需结合影像学检查、体格检查、临床症状及病史等进行综合评估，然而影像学发现并不总与临床症状相关。故定义症状性腰椎管狭窄症的放射学或病理学标准上仍未达成共识。马尾神经冗余征和马尾神经沉降征是腰椎管狭窄症的独特影像学现象，本文从病理机制、症状和体征、诊断及影像学特点等方面介绍两种影像学现象对腰椎管狭窄症诊断和治疗的价值，希望为腰椎管狭窄症的诊断和治疗提供新思路。Lumbar spinal stenosis is a common and frequently-occurring disease of lumbar degenerative diseases, and it is one of the common causes of low back and leg pain. The treatment of lumbar spinal stenosis can be divided into conservative treatment and surgical treatment. The diagnosis of lumbar spinal stenosis is comprehensive, which needs to be comprehensively evaluated by combining imaging examination, physical examination, clinical symptoms and medical history. However, imaging findings are not always related to clinical symptoms. Therefore, there is still no consensus on the radiologic or pathological criteria for defining symptomatic lumbar spinal stenosis. Cauda equina redundancy sign and cauda equina subsidence sign are unique imaging phenomena of lumbar spinal stenosis. This paper introduces the value of these two imaging phenomena in the diagnosis and treatment of lumbar spinal stenosis from the aspects of pathological mechanism, symptoms and signs, diagnosis and imaging characteristics, hoping to provide new ideas for the diagnosis and treatment of lumbar spinal stenosis.