Lateral Epicondylitis

EXPLORE MORE DIAGNOSES View Key Images View Key Images Watch Video Watch Video Review Stacks Review Stacks
  • Most common cause of elbow pain
  • Overuse syndrome of the common extensor origin, predominantly affecting the extensor carpi radialis brevis tendon
  • Known as ‘tennis elbow’ despite 95% of patients not being tennis players
  • Degenerative process (tendinosis) resulting from repetitive microtrauma rather than an inflammatory process as implied by the name
  • Complete rupture of the common extensor origin is rare
  • Abnormal thickening and increased signal intensity at the common extensor origin and peritendinous edema
  • MR shows focal T2 hyperintense fluid within partial thickness undersurface tendon tears
  • Lateral epicondyle bone marrow edema may be seen
  • May be associated with injury to the radial collateral ligament
  • Although uncommon, the symptoms of radial nerve entrapment can closely mimic those in lateral epicondylitis and should be considered when there is a strong history with no associated MRI findings
  1. Sonin AH, Fitzgerald SW, Hoff FL et al. MR imaging of the posterior cruciate ligament: normal, abnormal, and associated injury patterns. Radiographics 1995; 15(3):551-61
  2. Fanelli GC, Edson CJ. Posterior cruciate ligament injuries in trauma patients: part II. Arthroscopy 1995; 11:526-529
  3. Rodriguez W Jr, Vinson EN, Helms CA, Toth AP. MRI appearance of posterior cruciate ligament tears. AJR Am J Roentgenol 2008 191;4:155-159
  4. Sonin AH, et al. Posterior cruciate ligament injury: MR imaging diagnosis and patterns of injury. Radiology 1994;190:455-458

Related Cases


Pain triceps tendon tear

Tennis Elbow, Musculoskeletal (MSK), Lateral Epicondylitis,

Start Your
Membership Today!

Learn from our world renowned faculty.



Mastery Video Courses


Scrollable Cases and Reports


CME Available

Free Trial

Try it free for 7 days

All delivered in micro-learning modules to help
you get straight to learning