CT is superior to MRI in demonstrating the nidus in OO. It may be useful for the identification of the tumor origin and the assessment of the relationship of the tumor to the medulla. In selected cases, in juxta-articular located tumors, reactive bone changes are lacking, and predominantly synovitis may be present – a feature that can be appreciated using MRI [11,15-17]. Due to a variety of radio-morphological presentations, in the majority of cases, the combination of CT and MRI can establish the diagnosis of OO as confirmed in our study.

 Percutaneous CT-guided radiofrequency treatment of OO is a minimally invasive alternative to the surgical and medical management of OO. Preinterventional diagnostic imaging (including CT and MRI) and proper localization of the lesion is of utmost importance for RFA-planning.

 In conclusion, OO is predominantly found in male patients, is frequently arising in the lower extremities, and is usually located cortically. Concordant to the literature, a significant delay in the diagnosis of OO was seen in the athlete group. RFA is when compared to surgical treatment, reliable, and efficient treatment option in OO.