Objective: We conducted this study in order to find out the demographic causes of pathology for chronic lateral elbow pain
along arthroscopic criteria.
Material and Method: We conducted descriptive study of the medical records of the patients with chronic lateral elbow pain
who refractory to conservative treatment. Diagnostic arthroscopy of the elbow was performed by a specialist in elbow
surgery at HRH Princess Maha Chakri Sirindhorn Medical Center from March 2011 to October 2014.
Results: There were 29 patients who met inclusion criteria in our study. With regard to intra-articular pathologies, we found
a radiocapitellaplica in 41% of the patients. In 21% of the patients, we found isolated tennis elbow. The concomitant
radiocapitellaplica and tennis elbow were also found in 21% of patients. Cartilage lesion was found in 10% of the patients
and plica with posterolateral impingement was found in 7% of patients.
Conclusion: Causes of the chronic lateral elbow pain are complex. The diagnosis should be made by precise clinical sign and proper investigations. In our series, the lateral epicondylitis was not the majority cause of chronic lateral elbow pain. The
benefits of arthroscopy are not just the minimal invasive approach directly to the lesion, but also the intra-articular and
dynamic investigation allow the surgeon to make sure that all pathology were treated.

Keywords: Chronic lateral elbow pain, Arthroscopy