|Typical Joint showing Enthesis|
|Classification and external resources|
Enthesitis is inflammation of the entheses, the sites where tendons or ligaments insert into the bone. It is also called enthesopathy, or any pathologic condition involving the entheses. The entheses are any point of attachment of skeletal muscles to the bone, where recurring stress or inflammatory autoimmune disease can cause inflammation or occasionally fibrosis and calcification. One of the primary entheses involved in inflammatory autoimmune disease is at the heel, particularly the Achilles tendon.
It is associated with HLA B27 arthropathies like ankylosing spondylitis, psoriatic arthritis, and reactive arthritis. Symptoms include multiple points of tenderness at the heel, tibial tuberosity, iliac crest, and other tendon insertion sites.
- Maria Antonietta D'Agostino, MD; Ignazio Olivieri, MD (June 2006). "Enthesitis". 20 (3). Clinical Rheumatology: 473–486. doi:10.1016/j.berh.2006.03.007.
- The Free Dictionary (2009). "Enthesitis". Retrieved 2010-11-27.
- Bauman C, Cron RQ, Sherry DD, Francis JS (March 1996). "Reiter syndrome initially misdiagnosed as Kawasaki disease". The Journal of Pediatrics. 128 (3): 366–9. doi:10.1016/S0022-3476(96)70283-4. PMID 8774506.
- American College of Physicians. Medical Knowledge Self-Assessment Program (MKSAP-15): Rheumatology. "The Seronegative Spondyloarthropathies." 2009, ACP. Pg. 29-30. 
Information resource at www.enthesis.info
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