Cancer is nothing but an abnormal cell division.
When cell starts to divide abnormally, the condition is called cancer.
There have several types of cancer.
Breast cancer
Cervical cancer in women cervix
Prostate cancer
Blood cancer
Lung cancer
Brain tumor
Liver cerosis
Though, different risk factor is identified as the cause of cancer development. A group of scientists in Stanford university, identified a unique cause of development of cancer. This is genetic mutation.