Tendonitis and Tendinosis

Tendonitis and Tendinosis is a topic covered in the 5-Minute Pediatric Consult.

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  • Tendonitis: inflammation of a tendon or along the tendon sheath due to microtears
  • Tendinosis: tendon collagen degeneration due to chronic overuse


  • Increases with age and at time of puberty
  • May be slightly more common in girls

Risk Factors


Hypermobile individuals may be prone to tendonitis.


Inflammation and microtearing may be present.


  • Tendinosis associated with repetitive motion/overuse activities
  • Can also see with inflammatory rheumatic disease
  • Tendonitis associated with fluoroquinolone antibiotic use

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