The fear of cancer recurrence or progression is simply the anxiety people feel when they consider
that

a cancer may come back or progress.

1
Understanding the Fear of Cancer Recurrence or Progression
Older woman hugging husband
This fear is very common. For those who are currently cancer-free (no evidence of disease, or complete remission,) at least 70 percent have a mild or moderate fear that the cancer will again show
its face. For those who have a cancer that is currently stable, roughly 50 percent have a moderate to significant fear that the cancer will grow or spread.

Some degree of anxiety is good in cancer survivors. It's what prompts us to make our follow-up appointments and call our doctors if we note any new symptoms.Yet for some people, this fear can do more than motivate, and can actually hinder survivorship, lessening quality of life.

2
Acknowledge Your Fear
It may seem easy to acknowledge that you are afraid, yet it's not that simple. After hearing stories, or perhaps reading yet another obituary which speaks of someone’s courageous journey with cancer, it may not feel right to worry yourself. After all, you are cancer free or the cancer you have is stable. This reluctance to speak of fears is reinforced by society in another way. How many times do we hear that we need to have a positive attitude to beat cancer?

https://www.worldgistentertainment.com/2018/11/9-ways-to-cope-with-fear-of-cancer.html