Siblings of childhood cancer patients are labelled the forgotten children because they experience significant psychosocial distress and are isolated from support systems inside and outside the family. This study investigates the late consequences of the cancer experience for siblings. 60 siblings of cancer survivors were compared with control subjects on measures of psychosocial adjustment. No differences were found between siblings of cancer survivors and controls on emotional and behavioural problems and competence, suggesting that siblings adjust well to the period after cessation of treatment. The effect of demographic, family and disease-related characteristics on the siblings' psychosocial adjustment was limited. Whereas during treatment many psychosocial problems for siblings have been reported, this does not result in a heightened risk of psychological disturbance for siblings as a late effect. The implications for patient care are discussed.