Neoplasm of nasal cavity can be benign as well as malignant. Squamous papilloma arises from nasal vestibule or lower part of nasal septum. Inverted papilloma is a tumour of the nonolfactory mucosa of nose and paranasal sinuses. Intranasal meningoencephalocele is the herniation of brain tissues and meninges through foramen caecum or cribriform plate.
Malignant melanoma presents as salty-grey or bluish-black mass. Esthesioneuroblastoma also called olfactory placode tumour as it arises from the olfactory epithelium in the upper third of nose. Early features of ethmoid sinus malignancy include nasal obstruction, blood-stained nasal discharge and retro-orbital pain.