What tests are done to check for cancer?

Blood tests can:

• check your general health, including how well your liver and kidneys are working
• check numbers of blood cells
• help diagnose cancer and other conditions

Your blood sample is sent to the laboratory for analysis.

Can a blood test detect cancer in the body

This shows the different types of cells, chemicals and proteins in the blood.

Preparing for your blood tests

You can eat and drink normally before most blood tests. For fasting blood tests you need to stop eating and drinking beforehand.

Your doctor will tell you for how long.

What happens?

You sit or lie down to have the test.

A doctor, nurse or phlebotomist (person specialised in taking blood) chooses the best vein to use. This is usually from your arm or hand.

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Let them know if you are afraid of needles, get unwell with the sight of blood or are allergic to plasters or latex.

They put a tight band (tourniquet) around your arm above the area where they take the sample. You may need to clench your fist to make it easier to find a vein.

They clean your skin and then put a small needle into your vein.

Next, they attach a small bottle

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