Chondromyxoid fibroma

Chondromyxoid fibroma (CMF) is a rare type of bone tumor that typically occurs in the long bones of the legs, but can also be found in the bones of the hands, feet, spine, ribs, and skull. It is the least common of the cartilaginous tumors, accounting for less than 1% of all bone tumors.

Etiology

The exact cause of chondromyxoid fibroma is unknown. However, it is believed to arise from the cartilage cells that line the ends of the bones. Some researchers suggest that it may be related to an abnormal response to injury or inflammation, but this theory has not been definitively proven.

Clinical Presentation

Patients with chondromyxoid fibroma typically present with pain and swelling in the affected bone. The pain is often worse at night and may be relieved by rest. In some cases, the tumor may cause a visible deformity or limit the range of motion in the affected joint.

Diagnosis

The diagnosis of chondromyxoid fibroma is typically made based on a combination of clinical symptoms, radiographic findings, and histopathologic examination of a biopsy specimen. On radiographs, the tumor appears as a well-defined, lytic lesion with a thin rim of reactive bone. The histopathologic features include a mixture of cartilage, myxoid tissue, and fibrous tissue, hence the name "chondromyxoid fibroma".

Treatment

The standard treatment for chondromyxoid fibroma is surgical removal of the tumor. This can often be accomplished through a procedure known as curettage, in which the tumor is scraped out of the bone. In some cases, bone grafting may be necessary to fill the defect left by the tumor. The prognosis following treatment is generally good, with a low rate of recurrence.

See Also

• Bone tumor
• Cartilaginous tumor
• Curettage
• Bone grafting