A method of treating neoplasms of the nasal cavity. Fluid containing corticosteroids held in a canister is atomized via a compressed air supply to create particles sized for penetration and retention in the nasal cavity under pressure that is able to stent open the soft tissues of the nose to deliver the resultant mist into the whole of the nasal passages without the need for the patient to create an airstream through inhalation. The device consists of a main canister with a reservoir to hold the fluid, two air outlets and an insert that is placed over the air outlets, the insert having at least one outlet that is larger than the holes in the air outlet and allows the fluid to be atomized and injected directly into the nasal cavity.
