Congenital lumbar spinal stenosis (CLSS) is a type of vertebral central canal stenosis and has a different epidemiology with less severe degenerative change compared to acquired/degenerative lumbar spinal stenosis.
CLSS tends to affect patients at a younger age (30-50 years old) than lumbar spinal stenosis from degenerative or acquired changes.
CLSS usually results from congenitally shortened pedicles. The aetiology is unknown but it is seen in achondroplasia 2.
Central canal narrowing is the pertinent feature - various values have been proposed (AP mid-sagittal diameter <10-17 mm) but there is no consensus definition 2,3.
Features of degenerative disc disease and facet joint arthropathy are often present but mild in severity. Unlike degenerative spinal stenosis, CLSS is distributed throughout the lumbar spine 2.
- 1. Hosten N, Liebig T. CT of the Head and Spine. TIS. ISBN:B005R1PB8S. Read it at Google Books - Find it at Amazon
- 2. Soldatos T, Chalian M, Thawait S et-al. Spectrum of magnetic resonance imaging findings in congenital lumbar spinal stenosis. World J Clin Cases. 2014;2 (12): 883-7. doi:10.12998/wjcc.v2.i12.883 - Free text at pubmed - Pubmed citation
- 3. Imaging of Neurodegenerative Disorders. Thieme. ISBN:160406854X. Read it at Google Books - Find it at Amazon
- 4. Saifuddin A. Musculoskeletal MRI (Hodder Arnold Publication). CRC Press. ISBN:0340906618. Read it at Google Books - Find it at Amazon