- Serious illnesses like cancer or Neurofibromatosis Type 1 (NF1), can cause high levels of stress in a family. When a child is diagnosed with cancer or NF1, parents face numerous stressors, each of which can strain relationships. Many parents struggle to effectively cope with the changes in parenting roles that often accompany treatment of childhood cancer or NF1. How parents cope with this stress can influence whether the relationship is strengthened or weakened. Stress levels can also affect the care of the child who has cancer or NF1. Researchers want to better understand the critical time points and events during the child s treatment when the relationship becomes most stressed and/or strengthened.