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GCSE Physics · key term
An abnormal mass of cells produced by uncontrolled cell division; a malignant tumour can invade surrounding tissue and spread through the body.
Used by Edexcel
Specification 6.33P · Paper 1
Revise: Tumour TreatmentA tumour develops when abnormal cells divide uncontrollably. Radiotherapy exposes the tumour to ionising radiation, which can damage the DNA controlling cell behaviour. Sufficient damage can kill cancer cells or prevent them from continuing to divide, so the tumour may shrink or stop growing.
Use precise location language: external-beam radiation travels into the body from an outside source, whereas brachytherapy places a radioactive source inside or next to the tumour.
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