No, cancer is not always fatal if not treated. Depending on the type of cancer, the location, the size, and the stage, treatment can be effective in treating the cancer and preventing it from becoming fatal.
For example, if the cancer is caught in its early stages, surgery may be enough to remove the cancerous tumor before it spreads any further. In addition, radiation therapy and chemotherapy can be used to shrink tumors in more advanced stages. In many cases, the combination of these treatments can be effective in treating the cancer and giving the patient a good prognosis.
In some cases, however, cancer can become fatal if left untreated. If the cancer is large or has spread to other parts of the body, it can be difficult to treat and can become life-threatening. Additionally, some types of cancer, such as pancreatic cancer, are more aggressive and difficult to treat, meaning that if they are not treated in their early stages, they can quickly become fatal.
Overall, while cancer is not always fatal if not treated, it is important to get regular checkups and screenings so that any potential cancer can be caught and treated as early as possible. Early detection is key to preventing cancer from becoming fatal.