Insights into Imaging

Table 1 Classification by pattern of bone involvement

From: Imaging of skull vault tumors in adults

Pseudolesions	Lytic	Sclerotic/mixed	Transdiploic
Arachnoid granulation Meningo-/encephalocele Dilated vascular canals Internal hyperostosis Biparietal thinning Enlarged parietal foramina Sinus pericrani	Fibrous dysplasia Epidermal inclusion cyst Eosinophilic granuloma Intraosseous hemangioma Plasma-cell myeloma Giant-cell tumor Aneurysmal bone cyst Meningioma* Lymphoma* Metastasis*	Osteoma Osteosarcoma Meningioma* Lymphoma* Metastasis*	Meningioma* Hemangiopericytoma Lymphoma* Plasmacytoma* Metastasis*

*Metastasis, meninigioma, lymphoma, and plasmacytoma may be transdiploic, originating from the intracranial extraaxial soft-tissue, or intradiploic as primary bone lesions

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