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The Biology, Diagnosis and Treatment of Cancer - A Review Cancer is a disease where cells grow out of control and invade, erode and destroy normal tissue. The driving forces behind the development of cancer are damaged genes. The gene damage is often caused by environmental factors e.g. smoking. There are over 200 different types of cancer that can occur anywhere in the body. They all have different causes, different symptoms and require different types of treatment. Cancers develop because of a complicated interaction between our genes, our environment and chance. Research, so far, say there are two types of tumours, benign and malignant. Benign tumours are not cancer. They often can be removed and, in most cases, they do not come back. Cells in benign tumours do not spread to other parts of the body. As a result, benign tumours are usually not considered life-threatening, though they should certainly be monitored...

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