Difference between revisions of "Osteoarthritis"

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*Subchondral cysts.
*Subchondral cysts.
*+/-Mild inflammation (lymphocytes).
*+/-Mild inflammation (lymphocytes).
*Villous hyperplasia - synovium has finger-like projections into the joint space.
*+/-Villous hyperplasia - synovium has finger-like projections into the joint space.
**Normal synovium has a flat surface.
**Normal synovium has a flat surface.


Image:
Image:
*[http://ars.els-cdn.com/content/image/1-s2.0-S8756328212000683-gr1.jpg Osteoarthritis - panel B (els-cdn.com)].
*[http://ars.els-cdn.com/content/image/1-s2.0-S8756328212000683-gr1.jpg Osteoarthritis showing villous hyperplasia - panel B (els-cdn.com)].


==See also==
==See also==

Revision as of 12:39, 9 October 2012

Osteoarthritis, abbreviated OA, is a degenerative disease of the joint.

General

Risks

It is associated with:[1]

  • Advanced age.
  • Trauma.
  • Unusual loading (bony misalignment, obesity).

Gross pathology/radiology

Features:[2]

  • Loss of cartilage, especially asymmetrical (eburnation).
  • Osteophyte formation.
  • Subchondral cysts.
  • Subchondral sclerosis.

Memory device LOSS: Loss of cartilage, Osteophyte formation, Subchondral cysts, Subchondral sclerosis.

Microscopic

Features:[3]

  • Vertical clefts of the cartilage - characteristic.
  • Thickening of bony trabeculae (reactive phenomenon) due to fibrosis.
  • Subchondral cysts.
  • +/-Mild inflammation (lymphocytes).
  • +/-Villous hyperplasia - synovium has finger-like projections into the joint space.
    • Normal synovium has a flat surface.

Image:

See also

References

  1. Martel-Pelletier, J.; Pelletier, JP. (Apr 2010). "Is osteoarthritis a disease involving only cartilage or other articular tissues?". Eklem Hastalik Cerrahisi 21 (1): 2-14. PMID 20302555. http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--www.tevak.org-images-Eklemlinkout.png.
  2. Swagerty, DL.; Hellinger, D. (Jul 2001). "Radiographic assessment of osteoarthritis.". Am Fam Physician 64 (2): 279-86. PMID 11476273. http://www.aafp.org/afp/2001/0715/p279.html.
  3. Humphrey, Peter A; Dehner, Louis P; Pfeifer, John D (2008). The Washington Manual of Surgical Pathology (1st ed.). Lippincott Williams & Wilkins. pp. 658. ISBN 978-0781765275.