Final answer:
Remission is a period during which cancer has responded to treatment and appears to be under control.
Step-by-step explanation:
A period during which cancer has responded to treatment and appears to be under control is called remission. During remission, the signs and symptoms of cancer decrease, and there may be no evidence of cancer based on medical tests. However, it's important to note that remission does not always mean the cancer is cured; it means that the cancer is responding to treatment.
Learn more about Remission in cancer