Radon comes from the radioactive breakdown of naturally occurring radium found in most Florida soils, and in most earthen material used in the building process. In the vast majority of buildings with radon problems, the largest source of radon is soil gas entering the building through small openings in the foundation.
Symptoms of nasal cavity cancer and paranasal sinus cancer include chronic congestion, recurring infections of the sinuses, headaches and recurring nosebleeds, according to Cancer.net.
1 Sometimes swelling will be seen on the roof of the mouth. 2  Eye symptoms. 3  Double vision, persistent tearing, or bulging of the eye are all serious warning signs. 4  Lump in the neck. 5  If nasal cavity or paranasal sinus cancer has spread to lymph nodes in the neck, this may be the first sign.