Treatment of osteoid osteoma – is RFA the future of osteoid osteoma therapy?

Congress:

ECR 2020

Poster Number:

C-12119

Type:

Scientific Exhibit

Keywords:

Performed at one institution, Observational, Retrospective, Multidisciplinary cancer care, Surgery, Removal, Puncture, Percutaneous, MR, CT, Musculoskeletal bone, Interventional non-vascular, Musculoskeletal

Authors:

J. Igrec, I. Brcic, M. Bergovec, R. Igrec, M. A. smolle, B. Liegl-Atzwanger, M. Fuchsjäger, A. Leithner, R. H. Portugaller; Graz/AT

DOI:

10.26044/ecr2020/C-12119

DOI-Link:

https://dx.doi.org/10.26044/ecr2020/C-12119

Table 1: General patient- and tumour-related features.

Table 2: List of radiological differential diagnosis in patients with atypical imaging...

Table 3: List of performed imaging methods in the study with diagnostic accuracy of a...

Fig. 9: Increasing trend of the radiofrequency ablation in the treatment of osteoid...

Fig. 8: Epidemiological and clinical data of the osteoid osteoma in 7 athletes in our...

Results

CT was performed in 97 patients, MRI in 106 patients. Table 1

The lesions were most frequently located in the tibia (n=35; 30.4%), the femur (n=34; 29.6%), the humerus (n=9; 7.8%), and the radius (n=5; 4.3%). The rest of the lesions (n=44, 37.6%) were located in hands, sacrum, spine, feet, scapula, fibula, patella, ulna and acetabulum. Lesions were located cortically in 81% of the cases. In 1 patient the lesions were multifocal. Table 2 Table 3 The mean diameter of the nidus was 9.1 ± 5.4 mm (range 2 – 25 mm). A delay in the diagnosis was 11.0 ± 12.8 months.

Due to clinical challenges in the diagnosis of OO, additional information was gathered regarding athletes in our study group (n=7). The mean age of the patients in this group was 22.6 ± 17.2 years, the size of the nidus 9.1 ± 5.7 mm and delay in the diagnosis of 20.7 ± 11.1 months Fig. 8

A total of 109 patients underwent treatment at our institution: 55 were treated surgically, and 54 with RFA. Fig. 9

The primary clinical success rate in our study in RFA and surgically treated patients was 88.9%, and 92.7%, respectively. The secondary clinical success was in both groups 100%. In most of the patients, after the tumor recurrence, the same type of procedure was performed. In 2 patients, RFA treatment was initially performed followed by chirurgical excision after the new onset of clinical symptoms and radiologically confirmed tumor recurrence.

In operation specimens (n=44) the diagnosis of OO was histologically confirmed in 100%.