Incidental finding on shoulder x-ray imaging after trauma.
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Shoulder x-ray demonstrates a well circumscribed lucency in the proximal end of the humerus. The margins are sclerotic. No periosteal reaction is present.
Non-ossifying fibromas tend to present in adolescents and young adults ,with well defined lucent lesion with a sclerotic margin.
It is frequently an incidental finding when a radiograph is performed for alternative purposes, such as to assess for a fracture following trauma.
The differential includes; fibrous cortical defect, aneurysmal bone cyst, and fibrous dysplasia.
- Betsy M, Kupersmith LM, Springfield DS. Metaphyseal fibrous defects. (2004) The Journal of the American Academy of Orthopaedic Surgeons. 12 (2): 89-95. Pubmed