“ This is a rare, benign bone tumour, with 90% occurring between 20 and 30 years of age. It is similar histologically to osteoid osteoma. T...
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This is a rare, benign bone tumour, with 90% occurring between 20 and 30 years of age. It is similar histologically to osteoid osteoma. The central nidus is typically >1.5 cm and of variable appearance, ranging from lytic to densely sclerotic. Up to 40% are found in the spine, mostly the posterior elements.
PLAIN FILM
• Well-defined expansile lesion in the posterior elements of the spine is typical.
• Matrix calcification.
• Frequently associated with an extra-cortical mass.
MRI
• Non-specific low signal on T1 and high signal on T2 with mild marrow oedema
NUCLEAR MEDICINE
• Intense uptake on bone scan
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