Chondromyxoid Fibroma of the Fibula: A Case Report

Abstract

A case of chondromyxoid fibroma occurring at the proximal of the right fibula of a 16-year-old male is reported. Initial objective symptom was transient pain at the knee joint and radiological appearance was a relatively eccentric and expansile lytic lesion in the proximal of the right fibula with a sclerotic margin. There was no periosteal reaction. Computed tomography (CT) showed an expansile lesion of the proximal fibula with a soft tissue component in the medullary cavity. The cortex was thinned and partially destructed. Magnetic resonance imaging (MRI) showed intermediate signal intensity on T1-weight images and high signal intensity on T2-weight images in the Intramedullary space. The radiological features suggested a benign lesion. Open biopsy and curettage of the right fibula lesion were then performed and pathological findings revealed a chondromyxoid fibroma. Local recurrence was not observed for seven months after the operation.
There have been reports that the incidence of recurrence of chondromyxoid fibroma varies from 15% to 26%. The tendency for local recurrence is higher in children. Chondromyxoid fibroma of the fibula, although rare, must be considered as a differential diagnosis.