Panspinal canal stenosis is a well known complication of Achondroplasia. It can be difficult to decide which level is primarily responsible for this stenosis and the most suitable treatment. A 19-year-old woman who suffered from Achondroplasia with ossification of the yellow ligament is described. We performed laminectomy (Th8-L2) and PLF (L1-3) with instrumentation (Th12-L3). We found that 8 of 34. Achondropl astic patients had suffered from ossification of their yellow ligaments. We consider that there could be a relationship between Achondroplasia and ossification of the yellow ligament with reference to its static and dynamic factors in Achondro-plastic spinal stucture.
