Introduction: This study aimed to describe the magnetic resonance imaging (MRI) features of giant-cell tumours of bone. Methods: We analysed the clinical and MRI features of patients diagnosed with giant-cell tumours of bone confirmed by histopathology at our institution between 2010 and 2012. Results: The peak incidence was between the second and third decades of life. There was no gender predominance. The most frequent locations were the knee and wrist. Pain and swelling were the prevailing symptoms. Fifty-one per cent of the patients were found to have associated secondary aneurysmal bone cysts on histopathology. On MRI, lesions demonstrated signal intensity equal to that of skeletal muscle on T1-weighted images and low signal intensity on T2-weighted images in 90% of cases. In gadolinium-enhanced T1-weighted images, 76.6% of cases demonstrated heterogeneous enhancement. We observed cystic components involving more than 50% of the lesion in 17 cases (56.6%). There was extra-osseous involvement in 13 cases (43.3%). Conclusion: MRI offers a valuable diagnostic tool for giant-cell tumours of bone. Contrast-enhanced MRI can distinguish between cystic and solid components of the tumour. MRI is also the imaging modality of choice for evaluation of soft-tissue involvement, offering a complete preoperative diagnosis.
On physical examination, he had subcutaneous nodules on the medial aspect of the plantar surface of the feet, more voluminous on the right. The patient was otherwise healthy and vital signs and laboratory tests were unremarkable.Radiographs demonstrated absence of underlining bone disease. An ultrasound was performed and revealed bilateral hypoechoic nodules located in the distal part of the central bundle of the plantar fascia, which presented slight color Doppler flow. On MRI the nodules were iso to hypointense on T1 and T2-weighted images owing to their fibrous nature, hyperintense on STIR images and showed enhancement after contrast injection (Figure 1).
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