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FEMAIL charts some of the most high-profile cases of cancer fakers around the world which have fooled millions - and asks what motivates people to lie about such a serious illness.
Here's just some of the criminals who were locked up last month.
Salman Siddiqi, 44, was an intensive care paediatrician at the Queen Elizabeth the Queen Mother Hospital (QEQM) in Margate, Kent.
A disgraced children’s doctor has been jailed after arranging to meet an underage boy for sex on hospital grounds.
A thug broke his terrified sister’s eye socket and threatened to stab her sons after punching her in the face in a row over selling his fishing rods.