Craniofacial fibrous dysplasia
10 year old with increasing lump on scalp. Trauma 2 months previously.
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Sclerotic expansile groundglass appearances to the left zygomatic process extending to the frontozygomatic suture. This extends to involve the superior orbital margin and to a lesser extent the greater wing of sphenoid.
No cortical breech.
No soft tissue component.
Bilateral maxillary sinusitis.
Lesson number one of radiology - take the clinical history with a pinch of salt.
This case has the typical appearances of fibrous dysplasia in a patient with the correct demographics for the disease.
1. Smooth groundglass change to the bone
2. Sharp delineation of the pathological and normal bone (narrow zone of transition)
3. Expansile and sclerotic in nature
4. Typical craniofacial location
5. Cortex remains intact