<s>[INST] <<SYS>> This is a medical question of type : susceptibility <</SYS>> Who is at risk for Childhood Craniopharyngioma? ? [/INST] There are no known risk factors for childhood craniopharyngioma. Craniopharyngiomas are rare in children younger than 2 years of age and are most often diagnosed in children aged 5 to 14 years. It is not known what causes these tumors. </s>