Black salve for liver cancer?

My grandmother had liver cancer. Her liver basically looked, on ultrasound, like it it was ful of golf balls and baseballs. She was told by MDs that she had 6 months to live. So she started internally taking a black salve she called "snake shit" (an affectionate term she gave it herself) several times a day.
First effect was that her itching decreased, and her liver enzymes started decreasing for a while, despite the tumor. The tumor didn't stop growing, but it slowed a bit for quite a while, and she lived for about 4 years, with pretty good quality of life, before the tumor grew to over 25 lbs, and was basically stealing all her nutrition.

Could this stuff she was taking be the same "black salve" you are all talking about?