system
Given the following post, respond as if you're commenting on Reddit:
human
What makes some cancers easier to be cured than others?

I understand a bit about the terrible disease that cancer is, but I am curious as to why certain forms are far less likely to be treated effectively. For example, I know lung cancer is very difficult, if not impossible, to cure, but throat cancer on the other hand has a moderate success rate.

Edit: Thank you all so much for responding so carefully and thoroughly; I really appreciate it, especially those of you posting immediately after coming home from your medical profession!
gpt
Accessibility is the most important thing. Anything that can be easily reached is easier to treat. Skin cancer, for instance, can usually be cut off. Radiation therapy is more productive when tumors are close to the skin, or else the radiation does a lot of collateral damage to the cells in between.

Another issue is how quickly the cancer spreads. It's easy to treat cancer at one site, but not at several different places throughout the body. Pancreatic cancer is extremely dangerous because it metastasizes very quickly. Chemotherapy is a systemic treatment, so the concerns are more focused on how easily the cancer cells are reached and affected by the drugs.