Eosinophilic granuloma of the skull
Female child presented with upper scalp soft tissue swelling.
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A well defined lytic lesion of the frontal bone near the coronal suture. It has beveled egdes with hole with hole.
Eosinophilic granuloma or histiocytosis X is most often seen in children ages 1 to 15 with the peak incidence at 1-4 years of age.
Characteristic appearance in the skull:
- punched out lytic lesions without sclerotic rim
- double contour or bevelled edge appearance may be seen due to greater involvement of the inner versus the outer table (hole within a hole sign), best seen in the VR images