Enthesis
From Wikipedia, the free encyclopedia
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The enthesis (plural: entheses) is the connective tissue between tendon or ligament and bone.[1]
There are two types of entheses: Fibrous entheses and fibrocartilaginous entheses.
In a fibrous enthesis, the collagenous tendon or ligament directly attaches to the bone, whereas the fibrocartilaginous interface encompasses four transition zones:
- Tendinous area displaying longitudinally oriented fibroblasts and a parallel arrangement of collagen fibres
- Fibrocartilaginous region of variable thickness where the structure of the cells changes to chondrocytes
- Abrupt transition from cartilaginous to calcified fibrocartilage—the so-called 'tidemark' or 'blue line'
- Bone
Pathology
A disease of the entheses is known as an enthesopathy or enthesitis.[2] Enthetic degeneration is characteristic of spondyloarthropathy and other pathologies.
The enthesis is the primary site of disease in ankylosing spondylitis.
See also
References
- ↑ "enthesis". Medcyclopaedia. GE. Archived from the original on 2012-02-05.
- ↑ Benjamin, M.; Toumi, H.; Ralphs, J. R.; Bydder, G.; Best, T. M.; Milz, S. (April 2006). "Where tendons and ligaments meet bone: Attachment sites (‘entheses’) in relation to exercise and/or mechanical load". Journal of Anatomy 208 (4): 471–90. doi:10.1111/j.1469-7580.2006.00540.x. PMC 2100202.
External links
- Enthesis information site at www.enthesis.info
- Image of enthesis at Medscape
- Enthesopathy and Soft Tissue Shadows at chiroweb.com
Further reading
- Resnick D, Niwayama G (1983). "Entheses and enthesopathy. Anatomical, pathological, and radiological correlation". Radiology 146 (1): 1–9. PMID 6849029.
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