Baastrup’s disease is characterized by close approximation and abutment of spinous processes, interspinal bursitis, interspinous ligament degeneration/tears, subcortical cysts/erosions, edema, chondroid metaplasia, enchondral ossification involving opposing spinous processes, creation of synovial articulations, and occasionally the development of epidural cysts or epidural fibrotic masses Inters..
