What is Known:
• Social inequalities for cancer mortality are observed in all European countries and are particularly pronounced in France.
• Reducing these inequalities in prevention programs implies studying the knowledge and mental representations of cancer among children.
What is New:
• This study identified representations of cancer in young children according to social level.
• At age 9, children living in deprived areas are less able to produce content in discussions about cancer and have narrower mental representations and a more fatalistic view.