Cancer, as far as I'm aware, goes into remission and isn't cured. Remission is when there isn't any detectable signs of a cancer mass or growth in your body. So imaging doesn't pick up any tumors, your blood work doesn't indicate any hormonal changes, and biopsies come back negative.
A cure would be like say there is no cancer and it won't come back. Remission is more like we have no evidence of cancer and x% of maintain that state for x years.
Fun fact: your body is constantly making cancerous cells, but you have the ability to detect and destroy them before they get out of hand. Keep that immune system strong.