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Slice 6 of 1
Can you make the diagnosis?
Review the images, then reveal
XRMusculoskeletalConfirmedFRCR 2B
Brodie abscess
Clinical Presentation
Painful right knee with fever, tenderness.
- 1Well-defined eight-shaped lytic lesion of the distal femoral metaphysis surrounded by a thick dense rim of reactive sclerosis, oriented along the long axis of the bone and extending to the epiphysis through the growth plate
- 2On the MRI sequences the well-defined lesion has an intramedullary location within the femoral metaphysis, extending to the epiphysis through the growth plate
- 3It displays a low signal on T1, heterogeneous high signal on PD fat sat and T2 with a peripheral rim isointense to muscle on T1, hypointense on PD fat sat and T2 with a regular enhancement "penumbra sign"
- 4No evidence of intra-articular extension
- 5Mild surrounding bone marrow oedema is noted.