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Cancer is uncontrolled cell division that can lead to the development of a tumour.

There are two types of tumour:

1. Benign

• Encapsulated – surrounded by a boundary or capsule
• Do not spread

2. Malignant

• Less likely to be encapsulated
• Capable of spreading because groups of cancer cells can break off the primary tumour causing secondary tumours around the body
• Usually more dangerous

Prevention

• HPV vaccine – given to 12-13 year old girls to protect against cervical cancer
• Stop smoking because it can cause lung cancer
• Reduce exposure to UV light because it can cause skin cancer