Similar story here.

My mom was diagnosed around 2003, extremely aggressive breast cancer, they gave her around 9 months as I recall.

It went into remission. Treatment was very effective. Her doctor had no idea how such an aggressive cancer was put into remission so quickly.

Around 3 years later it was back despite routine checks and her being clear of cancer. This time it was everywhere very suddenly, yet it took 4 years to kill her. Such an awful way to go.