Skeletal Radiology

, Volume 40, Issue 12, pp 1629–1632 | Cite as

Paraarticular osteochondroma of a cervico-thoracic facet joint presenting as myelopathy

  • Takeshi OkamotoEmail author
  • Masashi Neo
  • Shunsuke Fujibayashi
  • Mitsuru Takemoto
  • Takashi Nakamura
Case Report


Conventional osteochondroma is the most common type of benign bone tumor [1, 2]. It usually originates near the end of a long bone and sometimes grows away from the joint. An osteochondroma is characterized by an osseous component capped by cartilage and is connected to bone by a stalk [3]. Spinal osteochondroma comprises only 3% of solitary osteochondroma but may cause spinal cord compression [4, 5, 6]. A paraarticular or juxtaarticular osteochondroma is a rare osteocartilagenous tumor that arises in the soft tissue adjacent to a joint without attachment to bone [2, 3, 7]. Although several case reports have described paraarticular osteochondromas, all of the lesions reported were adjacent to the joints of the extremities, most of which involved the knee region [3, 8]. To our knowledge, no case of spinal paraarticular osteochondromas has been reported. In this report, we present a patient with a paraarticular osteochondroma arising in the spinal canal just medial to the...


Spinal Canal Facet Joint Spinal Cord Compression Hyaline Cartilage Chondroma 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Conflict of interest

The authors declare that they have no conflict of interest.


  1. 1.
    Unni KK, Inwards CY. Osteochondroma. In: Dahlin’s bone tumors. Philadelphia: Lippincott Williams & Wilkins, 2010: 9–21Google Scholar
  2. 2.
    Maheshwari AV, Muro-Cacho CA, Pitcher JD. Extraskeletal para-articular osteochondroma of the posterior knee. Case report. J Knee Surg. 2009;22:30–3.CrossRefGoogle Scholar
  3. 3.
    Reith JD, Bauer TW, Joyce MJ. Paraarticular osteochondroma of the knee. Report of 2 cases and review of the literature. Clin Orthop Relat Res. 1997;334:225–32.CrossRefGoogle Scholar
  4. 4.
    Lotfinia I, Vahedi P, Tubbs RS, et al. Neurological manifestations, imaging characteristics, and surgical outcome of intraspinal osteochondroma. J Neurosurg Spine. 2010;12:474–89.CrossRefGoogle Scholar
  5. 5.
    Roach JW, Klatt JW, Faulkner ND. Involvement of the spine in patients with multiple hereditary exostoses. J Bone Joint Surg Am. 2009;91:1942–8.CrossRefGoogle Scholar
  6. 6.
    Yagi M, Ninomiya K, Kihara M, et al. Symptomatic osteochondroma of the spine in elderly patients. Reports of 3 cases. J Neurosurg Spine. 2009;11:64–70.CrossRefGoogle Scholar
  7. 7.
    Milgram JW, Dunn EJ. Para-articular chondromas and osteochondromas: a report of three cases. Clin Orthop Relat Res. 1980;148:147–51.Google Scholar
  8. 8.
    Ratcliff JR, Naqvi A, de la Roza G, et al. Soft tissue osteochondroma; case report and immunohistochemistry for parathyroid hormone-related protein. Ann Diagn Pathol. 2006;10(4):222–9.CrossRefGoogle Scholar
  9. 9.
    Jaffe HL. Tumors and tumorous conditions of the bones and joints. Philadelphia: Lea and Febiger; 1958. p. 558–67.Google Scholar
  10. 10.
    Ozturan KE, Yucel U, Cakici H, et al. Patellar tendinopathy caused by a para-articular/extraskeletal osteochondroma in the lateral infrapatellar region of the knee: a case report. Cases J. 2009;2:1–4.CrossRefGoogle Scholar
  11. 11.
    Song JK, Musleh W, Christie SD, et al. Cervical juxtafacet cysts: case report and literature review. Spine J. 2006;6:279–81.CrossRefGoogle Scholar
  12. 12.
    Miwa M, Doita M, Takayama H, et al. An expanding cervical synovial cyst causing acute cervical radiculopathy. J Spinal Disord Tech. 2004;17:331–3.CrossRefGoogle Scholar
  13. 13.
    Nijensohn E, Russell EJ, Milan M, et al. Calcified synovial cyst of the cervical spine: CT and MR evaluation. J Comput Assist Tomogr. 1990;14(3):473–6.CrossRefGoogle Scholar
  14. 14.
    Miyakoshi N, Shimada Y, Kasukawa Y, et al. Progressive myelopathy due to idiopathic intraspinal tumoral calcinosis of the cervical spine. J Neurosurg Spine. 2007;7:362–5.CrossRefGoogle Scholar
  15. 15.
    Flores J, Gallego JM, Bujan A, et al. Spinal cord compression due to tumoral idiopathic calcinosis. Spinal Cord. 2003;41:413–6.CrossRefGoogle Scholar
  16. 16.
    Nora FE, Dahlin DC, Beabout JW. Bizarre parosteal osteochondromatous proliferations of the hands and feet. Am J Surg Pathol. 1983;7:245–50.CrossRefGoogle Scholar
  17. 17.
    Abdelwahab IF, Contractor D, Bianchi S, et al. Synovial chondromatosis of the lumbar spine with compressive radiculopathy: a case report with review of the literature. Skeletal Radiol. 2008;37:863–7.CrossRefGoogle Scholar
  18. 18.
    Kyriakos M, Totty WG, Riew KD. Synovial chondromatosis in a facet joint of a cervical vertebra. Spine. 2000;25(5):635–40.CrossRefGoogle Scholar

Copyright information

© ISS 2011

Authors and Affiliations

  • Takeshi Okamoto
    • 1
    Email author
  • Masashi Neo
    • 1
  • Shunsuke Fujibayashi
    • 1
  • Mitsuru Takemoto
    • 1
  • Takashi Nakamura
    • 1
  1. 1.Kyoto University Graduate School of MedicineKyotoJapan

Personalised recommendations