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GCSE Combined Science · key term
A growth of abnormal cells formed through uncontrolled cell division. A tumour may be benign or malignant.
Used by AQA
Specification 4.2.2.7 · Paper 1
Revise: CancerA growing mass of abnormal cells is called a tumour. However, finding a tumour does not necessarily mean that it is cancerous: the important distinction is between benign and malignant tumours.
When comparing tumours, focus on invasion and spread, not simply their size: benign tumours remain localised; malignant tumours invade and can spread.
Describe the full sequence for secondary tumour formation: cells leave a malignant tumour, travel in the blood and divide at another site.
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