Researchers have announced a huge breakthrough for people with melanoma, the deadliest form of skin cancer.
A new treatment literally "melts away" the deadly disease for some patients.
It only works for two or three out of every ten patients, but that's a huge success rate.
The treatment is called Ipilimumab, or "Ipi" for short.
It utilizes a protein that helps the immune system attack the disease.
There are drawbacks, however.
It doesn't work for most patients and doctor's can't predict who will respond.
It can also trigger rheumatoid arthritis and colitis.
The drug is still experimental, but experts say it's very promising.
The trial involved almost 700 patients with advanced melanoma.
On average they lived three-and-a-half months longer than patients without the treatment.