Computed tomography-guided percutaneous trephine removal of the nidus in osteoid osteoma patients: experience of a single center in Brazil

Objective

To report the results of computed tomography (CT)-guided percutaneous resection of the nidus in 18 cases of osteoid osteoma.

Materials and Methods

The medical records of 18 cases of osteoid osteoma in children, adolescents and young adults, who underwent CT-guided removal of the nidus between November, 2004 and March, 2009 were reviewed retrospectively for demographic data, lesion site, clinical outcome and complications after procedure.

Results

Clinical follow-up was available for all cases at a median of 29 months (range 6–60 months). No persistence of pre-procedural pain was noted on 17 patients. Only one patient experienced recurrence of symptoms 12 months after percutaneous resection, and was successfully retreated by the same technique, resulting in a secondary success rate of 18/18 (100%).

Conclusion

CT-guided removal or destruction of the nidus is a safe and effective alternative to surgical resection of the osteoid osteoma nidus.

Reliability of the "American Knee Society Score" (AKSS)

Objective

To analyze the reproducibility of the "American Knee Society Score" (AKSS) scale, and determine its measurement, in order to make it useful for the evaluation of patients with osteoarthritis or who have undergone total knee arthroplasty.

Methods

In the first interview, the AKSS was applied along with the SF-36 and WOMAC (examiner 1). After thirty minutes the same patients answered only the AKSS. After a two week break, a third additional interview with AKSS was applied (examiner 2).

Results

We selected 58 patients with a mean age of 67.4 years. In the analysis of reproducibility, by ICC, there was strong inter-examiner and intra-examiner correlation for two AKSS components. In the individual items analysis there was good correlation for "Pain", "Range of Motion", "Flexion contracture" and all items of the AKSS Function component. Validation through the Pearson coefficient showed good correlation between AKSS "Pain," WOMAC "pain" and SF-36 "Pain domain", and good correlation between the AKSS and SF-36 "Functional Capacity domain".

Conclusion

The AKSS adapted to Brazilian culture is useful and reliable for the evaluation of individuals with osteoarthritis or those who have undergone TKA.