Cancer treatment is a vast area, so you would need to narrow it down.
You could look at "targeted" treatment, which usually means taking pills rather than intravenous chemotherapy.
There have been lots of breakthroughs in this area in the past 5 or 10 years.
You could focus on one type of cancer (bearing in mind that there are often sub-types within these), such as lung cancer.
There is also the use of proton beam therapy which is relatively new and highly specialised.