Health Education for Cancer Patients and Their Families

- Causes of Cancer

A primary cause for cancer cannot be pinpointed, but several factors may contribute to its occurrence, including environmental, genetic factors, and an individual's unique traits. The mechanism through which a normal cell turns into a cancerous cell is believed to involve several genetic mutations in the cell’s DNA, particularly mutations affecting the part responsible for directing cell growth and division. Any error in the instructions that normally stop the cell from performing its regular functions may allow it to transform into a cancerous cell. There are many reasons for these mutations, which can be divided into hereditary mutations, passed from the parents, and acquired mutations that occur after birth and are responsible for most cases of cancer.

These mutations can occur due to various causes such as exposure to certain chemicals, radiation, viruses, smoking, unhealthy lifestyle choices, obesity, and certain hormonal disorders or chronic inflammation. It is important to note that the body’s cells have defensive mechanisms to protect against these mutations and disruptions in their genetic material. However, in rare cases, cells may fail to detect these disruptions, leading to their transformation into cancerous cells. It is also noteworthy that a cell typically does not become cancerous unless it has undergone several genetic mutations. Scientists have not yet determined the exact number of genetic mutations that lead to cancer, and it is believed that the number of mutations causing cancer depends on the type of cancer.

Although some inherited mutations may increase the risk of cancer, they do not necessarily mean the person will develop cancer. In such cases, the individual may need fewer acquired mutations for a cell to turn cancerous.