3. It is also worth knowing that most often this disease occurs in people older than 40 years. This is due to the wrong way of life or genetic diseases that could be passed on to you from your parents. Thyroid cancer is not the most dangerous type of cancer and there is always the possibility of a surgical operation where the doctor will remove your inflammation or swelling of the organ. Time is important for every kind of disease. The more often you start treatment, the easier it will be for you.