Table 2 Differential diagnosis established upon clinical, endoscopic, and radiological findings [5]

- Nasal polyp

- Mucous retention cyst

- Antrochoanal polyp

- Mucocele

- Dacryocystocele

- Nasal dermoid glioma

- Encephalocele

- Osteoma

- Schneiderian papilloma

- Juvenile nasopharyngeal angiofibroma

- Hemangiopericytoma

- Capillary hemangioma

- Cavernous hemangioma

- Vascular malformation

- Granulomatosis with polyangiitis

- Sarcoidosis

- Squamous cell carcinoma

- Adenoid cystic carcinoma

- Adenocarcinoma

- Esthesio-neuroblastoma

- Chordoma

- Lymphoma

- Melanoma

- Rhabdomyosarcoma

- Fibrous histiocytoma