Just came across this and thought some might be interested. This is from the New England Journal of Medicine, where a huge tumor just under the breast was eradicated with one "dose of Immunotherapy" and a big hole was left in her 3 week follow up.
It's a combination of two drugs I assume since it's FDA approved. I'm not a fan of FDA approved drugs, but if nothing else is working any port in a storm right? The drugs were ipilimumab & nivolumab.
This article has before and after pictures and X-rays. The picture is graphic, so be warned.