May Be Caused by

Breast cancer metastasis

Congenital cholesteatoma

Dermoid

Eosinophilic granuloma

Fibrosing osteitis

Meningioma

Metastasis

Multiple myeloma

Osteomyelitis

Osteonecrosis of skull

Paget disease of bone

Sarcoidosis

Staphylococcal osteomyelitis

Syphilis

Tuberculosis