May Be Caused by

 Common

Bone metastasis

Chondroma

Cranial nerve V schwannoma

Cranial nerve VIII schwannoma

Epidermoid

Ewing sarcoma

Facial nerve hemangioma

Facial nerve vascular hamartoma

Glomus tympanicum

Langerhans cell histiocytosis

Osteochondroma

Squamous cell carcinoma extending through basal foramina

 Uncommon

Aneurysmal bone cyst

Cholesterol granuloma

Chordoma

Cranial nerve IX schwannoma

Cranial nerve X schwannoma

Cranial nerve XI schwannoma

Cranial nerve XII schwannoma

Fibrosarcoma

Giant cell tumor

Meningioma

Petrous apicitis

Pituitary macroadenoma

Plasmacytoma