Nasal carcinoma, Sinonasal carcinoma, Sinonasal malignancies, Skull base cancers. Root Cause of Disease Smoking and being around people who are smoking. Breathing in air pollution. Long-term exposure to chemicals and irritants in the air at work, such as wood dust, fumes from glue, rubbing alcohol and formaldehyde, and dust from flour, chromium and nickel. Symptoms…