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Morpho-functional changes in human tendon tissue.

I Galliani1, S Burattini, A R Mariani

  • 1Department of Human Anatomy, University of Bologna, Italy. galliani@biocfarm.unibo.it

European Journal of Histochemistry : EJH
|June 5, 2002
PubMed
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Chronic lateral epicondylitis, commonly known as tennis elbow, is a degenerative tendon issue. Microscopic analysis reveals significant structural changes in affected elbow tendons, confirming a degenerative process.

Area of Science:

  • Orthopedics
  • Histopathology
  • Biomedical Engineering

Background:

  • Lateral epicondylitis, often termed tennis elbow, is a common condition affecting the elbow extensor tendons.
  • While often treated as an inflammatory condition, its underlying pathology remains debated.

Purpose of the Study:

  • To investigate the microstructural and ultrastructural changes in tendons from patients with chronic lateral epicondylitis.
  • To characterize the degenerative nature of the condition at a cellular and tissue level.

Main Methods:

  • Insertion tissue biopsies from the common extensor tendons of 11 patients with chronic lateral epicondylitis were obtained.
  • Samples were analyzed using both light and electron microscopy to examine tissue morphology and cellular structures.

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Main Results:

  • Biopsies revealed diverse structural alterations including collagen abnormalities, hyaline degeneration, tenocyte loss, and fibrocartilage metaplasia.
  • Evidence of calcification, neovascularization, and vessel wall modifications were observed in the affected tendon areas.
  • Degenerative changes were localized to specific zones, often adjacent to morphologically normal tendon tissue.

Conclusions:

  • Histological and electron microscopic findings support lateral epicondylitis being a degenerative tendinopathy rather than purely an inflammatory process.
  • The study highlights widespread degenerative changes affecting all tendon components in chronic lateral epicondylitis.
  • Understanding these degenerative aspects is crucial for developing effective treatment strategies for tennis elbow.