Aneurysmal bone cyst of fibula
Presentation:
Ankle pain
Patient Data:
Lucent expansile lesion in distal fibula, no pathological fracture
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Tracer uptake is seen both during blood pool and delayed phases.
A lesion in the distal fibula is demonstrated with extension through the lateral cortex and into the adjacent soft tissues. It is multiloculated with many fluid-fluid levels, best seen on axial imaging. Enhancement of septae and rim is present. The margins of the lesion are very well defined, and although there is oedema in the surrounding soft tissues, there is no bone marrow oedema in the adjacent normal bone.
This patient went on to have surgery and histology confirmed the diagnosis of an aneurysmal bone cyst (ABC).
Films have been obtained post surgical treatment.
Distribution of aneurysmal bones cysts
Case Discussion:
This case demonstrates typical multi-modality imaging features of an aneurymal bone cyst (ABC), in albeit a somewhat atypical location.
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