Sinusitis is not directly related to sinus cancer, so it is not possible to specify how often sinusitis may become cancerous.
Sinusitis is an acute and chronic inflammation of the sinus mucosa and sinus cavity, including bacterial infection, allergic inflammation, and fungal inflammation. With active and timely symptomatic treatment, most patients can be cured and will not lead to cancer. If sinusitis is not treated in time and the nasal cavity is stimulated by inflammatory infection for a long time, it may become cancerous, but the exact time cannot be specified, and some patients may not even become cancerous for life. The cause of sinus cancer is still unclear, considering that it may be more related to life, diet, living, family genetics, and living area. Therefore, there is no direct correlation between sinusitis and cancer, let alone when it becomes cancerous.
Patients who present with inflammatory sinus lesions can be treated with oral sinusitis medication as prescribed by the doctor and actively control their diet and life, and most of them can achieve better results.