Perhaps cancer in general, but not particularly types of cancer, when you recognize that there are multiple forms of lung cancer, breast cancer, etc. -- common forms of cancer are not a single disease.

The trouble with cancer drugs is that you take them for a short time and you either die or you survive.

The real money is in drugs that a large segment of the population can take for an indefinite time such as Lipitor, blood pressure meds, asthma inhalers, and the perpetually elusive obesity cure.