That's so sad, and I'm so sorry for your loss.
I lost both my grandmothers to cancer and my step father's mother, aunt and his cousin's wife. My best friend had thyroid cancer, my brother's old roommate had leukemia (neither of them died, but had to fight it), my own brother still in his 20s had a tumor in his brain that was cancerous, they got it out and he is healthy today, THANK GOD!