A commonly adopted method of grading the severity of spondylolisthesis is the Meyerding classification. It divides the superior endplate of the vertebra below into 4 quarters. The grade depends on the location of the posteroinferior corner of the vertebra above.
- grade I: 0-25%
- grade II: 26-50%
- grade III: 51-75%
- grade IV: 76-100%
- grade V (spondyloptosis): >100%
History and etymology
The grading system is named after its inventor Henry W Meyerding, who was an American orthopaedic surgeon at the Mayo Clinic, Rochester, Minnesota. He proposed the classification in an article in 1932 2.
- 1. Lovell WW, Winter RB, Morrissy RT et-al. Lovell & Winter's Pediatric Orthopaedics. Lippincott Williams & Wilkins. (2006) ISBN:0781753589. Read it at Google Books - Find it at Amazon
- 2. Meyerding HW. Spondyloptosis. Surg Gynaecol Obstet. 1932;54:371–377.
- 3. He LC, Wang YX, Gong JS, Griffith JF, Zeng XJ, Kwok AW, Leung JC, Kwok T, Ahuja AT, Leung PC. Prevalence and risk factors of lumbar spondylolisthesis in elderly Chinese men and women. (2014) European radiology. 24 (2): 441-8. doi:10.1007/s00330-013-3041-5 - Pubmed
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