Nonossifying fibroma
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Synonyms and keywords: Fibroxanthoma; Fibrous cortical defect
Overview
- Non ossifying fibroma is a benign fibroblastic mass. It typically arises in the metaphyses of long bones, particularly the distal femur and tibia. It is common, possibly affecting more than 40% of boys and 30% of girls.It is thought to originate at the insertion site of a ligament or tendon and it has been suggested that it may reflect a previous traction injury. Lesions are usually asymptomatic, although they are occasionally associated with pathological fractures.
Diagnosis
Chest X-ray
- Eccentric lucent lesion with thinned cortex, which may have a multilocular appearance and often a sclerotic margin.
- The lesions spontaneously regress with time and radiographs will show increasing marginal sclerosis followed by progressive ossification of the lesion extending from its diaphyseal aspect.
- The appearance on plain films is characteristic and no further imaging is indicated.
