Long Term Outcome of Juxta-articular Osteoid-osteoma Managed by Computed-tomography-radiofrequency-ablation

Background:
Juxta-articular osteoid osteoma (also termed intra-capsular or sub-chondral osteoid osteoma) are uncommon. Management of these lesions by Computed-Tomography-Radio-Frequency-Ablation (CT-RFA) was a major advancement, as it obviates the need to perform an intra-capsular open surgery. This technique may eradicate the lesion but may also lead to synovial reaction and/or articular surface changes. The current study evaluates long term outcome of all patients treated by CT-RFA for juxta-articular osteoid osteoma in a single center.

Objectives:
To evaluate the rate of clinical eradication and post procedure articular complications after CT-RFA of osteoid-osteoma.

Methods:
All patients having osteoid-osteoma that is

Results:
The cohort includes 59 patients, mean age was 20 (range 3-59) years, 15 were females and 13 had active physeal plates. Mean follow-up time was 6.6 (range 1-11) years (11 patients were not available for follow-up). 50% were in the hip joint; others were located in various joints (knee, ankle, elbow, shoulder and trunk). Early pain relief

Conclusions:
This study features a large cohort of patients managed by CT-RFA for an osteoid-osteoma within a joint capsule and in the vicinity of the articular cartilage. The few patients with joint complaints may represent an articular damage due to CT-RFA in such location. It also demonstrates the relative safety of the procedure, and the ability to succeed in ablation of the lesion in a location were surgical excision is less plausible.