Osteochondroma of proximal fibula
Right knee pain following a fall.
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Arising from the posterior surface of the fibula head is a moderate sized osteochondroma.
Osteochondromas are benign tumours that can occurs at multiple sites. When there is change in size, or pain, malignant degeneration should be considered. Ultrasound can be used to measure the cartilage cap as an assessment of malignant degeneration.