Why Is Heart Cancer So Rare?

The video explains that cancer cells are constantly forming in our bodies, but our immune system usually neutralizes them. Cancer is not a single disease but many, affecting various organs. Heart cancer is extremely rare because heart cells stop dividing after birth, reducing the chance of cancerous growths. Tumors in the heart are rare and usually originate elsewhere in the body or occur in fetuses. The video reassures viewers that heart cancer is not a common concern.

What happens to tumors that might have grown in the heart during fetal development?

In what ways can heart cancer develop, according to the text?