Muhle staging system of cervical canal stenosis
stage 0: physiological alignment of the cervical spine is seen
stage 1: disc herniation or protrusion without cord impingement on flexion and extension
stage 2: cervical spondylosis with anterior cord impingement on flexion and extension. No posterior cord encroachment or pincer effect is seen at this stage.
stage 3: cervical spondylosis with restricted motion of the involved segment, anterior or posterior cord impingement and pincer effect
stage 4: cervical spondylitic myelopathy, anterior and/or posterior cord impingement and pincer effect at one or multiple levels, adjacent to or away from the primarily involved segment.
Muhle staging system of cervical canal stenosis
stage 0: physiological alignment of the cervical spine is seen
stage 1: disc herniation or protrusion without cord impingement on flexion and extension
stage 2: cervical spondylosis with anterior cord impingement on flexion and extension. No posterior cord encroachment or pincer effect is seen at this stage.
stage 3: cervical spondylosis with restricted motion of the involved segment, anterior or posterior cord impingement and pincer effect
stage 4: cervical spondylitic myelopathy, anterior and/or posterior cord impingement and pincer effect at one or multiple levels, adjacent to or away from the primarily involved segment.