Dynamic MR imaging of osteoid osteomas: correlation of semiquantitative and quantitative perfusion parameters with patient symptoms and treatment outcome

Abstract

The identification of an early and steep enhancement with short time to peak and a short delay between the arterial and nidus peaks on MR perfusion in the postoperative setting is highly indicative of an osteoid osteoma recurrence. Key points • Magnetic resonance perfusion is becoming widely used for several tumours. • MR perfusion measurements correlate well with osteoid osteoma-related symptoms. • MR perfusion has high diagnostic performance for osteoid osteoma recurrence. • MR perfusion can improve the diagnostic confidence of osteoid osteoma recurrence.

Impact of Magnetic Resonance Imaging (MRI) Findings on Management of Symptomatic Patients Following Radiofrequency Ablation (RFA) of Osteoid Osteoma (OO)

“…Multiple image-guided ablative modalities have been utilized for the treatment of OO, including RFA, laser, cryoablation, microwave, and high intensity focused ultrasound (HIFU). Excellent technical success, pain resolution, and low recurrence rates have been reported following ablation for OO [3][4][5][6][7][8].…”

Osteoid Osteoma of the Femoral Neck: Use of the Half-Moon Sign in MRI Diagnosis

“…To our knowledge, this study is the first to describe a way to identify osteoid osteoma of the femoral neck just by recognizing the appearance of bone marrow edema on coronal STIR and axial fat-suppressed T2weighted turbo spin-echo images without the need for optimization of MRI technique [6,[11][12][13]. We have used the term "half-moon sign" to describe the half-disc appearance of bone marrow edema in cases of osteoid osteoma of the femoral neck.…”

Musculoskeletal wide detector CT: Principles, techniques and applications in clinical practice and research

“…4). Similar to MRI perfusion, CT perfusion can be useful for tumor characterization, differentiation between residual/recurrent tumor and post-operative fibrosis and biopsy targeting [24,25]. In preliminary testing, the effectiveness of CT guided ablation could be confirmed with intraoperative CT perfusion, which demonstrated the absence of nidus enhancement immediately after ablation (Fig.…”