May Be Caused by

 Common

Benign bone neoplasm

Burkitt lymphoma

Foreign body

Lymphoma

Malignant bone neoplasm

Metastasis

Myeloma

Nasal carcinoma

Osteoma

Osteomyelitis

Paget disease of bone

Paranasal sinus carcinoma

Sarcoma

Secondary orbital abscess

Secondary orbital cellulitis

Skin carcinoma

Trauma

 Uncommon

Aneurysmal bone cyst

Chondroma

Craniofacial malformation

Esthesioneuroblastoma

Fibrous dysplasia

Granulomatous disease

Hydatid disease

Inverted papilloma

Juvenile angiofibroma

Langerhans cell histiocytosis

Lethal midline granuloma

Mucocele

Neurofibromatosis

Ossifying fibroma

Osteochondroma

Osteopetrosis

Sarcoidosis

Tuberculosis

Wegener granulomatosis