Parasyndesmophytes or floating syndesmophytes are, as the name suggests, paravertebral dystrophic soft tissue calcifications or heterotopic ossifications.
They are known to be seen in 4:
Initially they begin at a distance from the vertebral body and intervertebral space. In early disease they are best described as thick and fluffy or thin and curvilinear densities on one side of the spine, paralleling the lateral surfaces of the vertebrae and discs. Eventually they will grow to form large and bulky masses, merging with the underlying bone and disc.
- 1. Dihlmann W. Current radiodiagnostic concept of ankylosing spondylitis. Skeletal Radiol. 1980;4 (4): 179-88. Pubmed citation
- 2. Jones MD, Pais MJ, Omiya B. Bony overgrowths and abnormal calcifications about the spine. Radiol. Clin. North Am. 1988;26 (6): 1213-34. Pubmed citation
- 3. Taljanovic MS, Hunter TB, Wisneski RJ et-al. Imaging characteristics of diffuse idiopathic skeletal hyperostosis with an emphasis on acute spinal fractures: review. AJR Am J Roentgenol. 2009;193 (3_supplement): S10-9, Quiz S20-4. doi:10.2214/AJR.07.7102 - Pubmed citation
- 4. Clinical Imaging: With Skeletal, Chest, & Abdominal Pattern Differentials, 3e. Mosby. ISBN:0323084958. Read it at Google Books - Find it at Amazon
- 5. Hermann KG, Althoff CE, Schneider U et-al. Spinal changes in patients with spondyloarthritis: comparison of MR imaging and radiographic appearances. Radiographics. 2005;25 (3): 559-69. doi:10.1148/rg.253045117 - Pubmed citation
- 6. Sissons H, Murray R, Kemp H. Orthopaedic Diagnosis: Clinical, Radiological, and Pathological Coordinates. Springer. ISBN:1447113500. Read it at Google Books - Find it at Amazon