[Pseudospondylolisthesis and chondrocalcinosis].

Degenerative spondylolisthesis L4-L5 progressing rapidly toward a surgical intervention for a sciatica in a 52 years old female. The radiography, as well as an anatomo-pathological study, showed an erosive osteoarthrosis of the vertebral articular processes. The disc biopsy revealed a chondrocalcinosis which was also found in the knees on radiological examination. This observation provides, at the spine, a special example of "erosive osteoarthrosis with chondrocalcinosis".