cancer

• heavy alcohol consumption can cause the brain to..


  become soft
• cirrhosis definition


  a disease that destroys liver tissue and active liver cells are replaces with scar tissue so they cannot carry out its functions
• carcinogen definition


  a substance capable of causing cancer in a living tissue
• carcinogen..


  alcohol increases risk of liver cancer and liver cancer spreads rapidly and is therefore difficult to treat
• mutation 


  a change in DNA stricture
• cancer


  uncontrolled cell growth (often caused my mutations)
• benign


  cancers limited to one area/organ
• malignant


  cancers where cells are breaking off and travelling through the blood to other organs
• symptoms


  a lump suddenly appearing

  changes to bowel habits

  unexplained bleeding
• immunotherapy 


  uses our immune system to fight cancer (biological therapy)

  helps the immune system recognise and attack cancer cells
• chemotherapy 


  potent drugs are administered to destroy cancerous cells and prevent them from multiplying

  can be very effective for treating lung cancer

  can damage healthy cells too and cause significant side effects
• radiation therapy


  advanced machines are used to deliver intense x ray or proton beams that kill cancer cells

  can be delivered internally or externally

  may cause harm to healthy cells but they can repair themselves