Heart cancer is rare. Skin cancer is the most common form, occurring in about one in five people during their lifetimes. Liver cancer affects about one in 100. However, heart cancer develops in only about one in 50,000 people. When it does occur, it usually does not begin in the heart but metastasizes from another area of the body.
The fact that heart cancer is rare is connected with the slow regeneration of heart cells. The body maintains itself by regenerating cells. When cells are damaged, the body replaces them automatically with new cells. When new cells are formed, mutations are possible, and sometimes mutations can cause the regeneration process to go beyond what’s necessary. When new cells continue to grow exponentially, they form masses, which we call malignancies.
The uncontrolled growth of these new cells takes over and robs the body of energy needed for other functions. The faster cells regenerate, the greater the chance of mutations, which increases the possibility of uncontrolled cell growth. When a person smokes or uses tobacco, it affects the lungs, throat, and mouth, causing damage to those tissues and prompting those cells to be regenerated. This increased regeneration raises the chance of mutations and cancer in those areas.
Heart cancer is rare, in part because heart cells regenerate very slowly. Less than half of the heart cells you had when you were born will be replaced during your lifetime. However, your skin cells regenerate completely in less than two months. The slow regeneration of heart cells is apparently a major reason why heart cancer is rare. In some animals, such as amphibians, heart cells regenerate much more quickly. In mammals and humans, regeneration is much slower. Instead of making new cells, the heart develops scar tissue. The trade-off is that the heart is durable and functional from birth to natural death in humans.
Skin cells regenerate quickly, which is good because skin is exposed and easily damaged. At the same time, it means there’s a greater danger of skin cancer. Other parts of your body that are mistreated in various ways, such as your lungs from smoking or your liver from alcohol, must regenerate damaged cells, resulting in an increased risk of cancer. God’s design of our bodies is truly amazing. Many of the health problems we face stem from our misuse of the gift God has given us. Being good stewards of God’s gifts benefits us in many ways, including a longer and healthier life.
— Roland Earnst © 2026
Reference: popsci.com
