Chondromyxoid fibroma is the least common benign bone tumor, accounting for less than 1% of all bone tumors. Pathologically, it is composed of varying proportions of chondroid, myxoid and fibrous elements. The most common anatomical site is the metaphyseal region of the long bone, and the typical radiologic appearance is a cortical expansile osteolytic lesion with a lobulated sclerotic margin, and septa. We report the plain and MRI findings of a relatively typical chondromyxoid fibroma occuring in the proximal fibula.
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