Telling family, school & friends about your child's cancer — a compassionate guide

There is no legal obligation to disclose your child's diagnosis to anyone beyond the medical team and, for school-age children, the school where your child is enrolled. How much you share, and with whom, is entirely your decision. Many parents find that some disclosure helps — family members can provide practical support, and teachers need to know so they can make adjustments for your child. Others prefer privacy and share only what is necessary. There is no right or wrong approach. The CION care team can help you think through what information different people actually need, so you share only what is helpful and protect your family's privacy where you want to.

Siblings need honest, age-appropriate information as soon as possible. Children who are not told often sense that something is seriously wrong and imagine scenarios that are more frightening than the truth. For young children (under 5), a simple explanation — "your brother/sister is very sick and needs strong medicine" — is usually enough. School-age children (6–12) can be told the name of the cancer and that the doctors have a plan to treat it. Teenagers often want more detail and should be given the opportunity to ask questions privately. Reassure siblings that they did nothing to cause the illness, that they cannot catch it, and that they remain loved and important. Ask the CION team about referral to a child counsellor if a sibling is showing signs of significant distress.

The school's principal or class teacher needs to know enough to support your child when they return and to explain absences sensitively to other children and parents. You do not need to share the full medical record — a brief meeting or letter explaining that your child has been diagnosed with a serious illness, that they will have frequent medical appointments, and that they may look or feel different when they return is usually sufficient. You can request a meeting with the school counsellor as well. Schools can arrange home tutoring, modified workloads, and special examination provisions for children in treatment. Ask the school for their policy on supporting children with serious illness, and involve the CION social worker if you need help navigating these conversations.

Telling grandparents is often one of the hardest conversations because parents feel they must manage their own grief while comforting their parents at the same time. Try to have this conversation in person if possible, or via a video call if distance makes that impossible. Give them honest information — grandparents who are kept in the dark tend to feel excluded and may inadvertently say unhelpful things to your child. Tell them clearly what kind of support you actually need (cooking meals, being available for calls) so that their instinct to help is channelled usefully. Let them know that the medical team has a plan, and share any written information the oncology team has given you. It is fine to say "I don't know" in response to questions you cannot answer yet.

Some families find social media a helpful way to update a wide circle of people without having to repeat the story many times. Others prefer complete privacy. Before posting, consider: your child's own wishes if they are old enough to have a view; whether you want public or private posts; and what you will do when the responses arrive (some families find the outpouring of messages, however loving, overwhelming during a difficult period). A private group or a single trusted person who can update others on your behalf can reduce the burden significantly. Whatever you decide, you are not obligated to share anything, and you can change your approach at any time.

Extended family often means well but can inadvertently add pressure — sharing frightening stories, suggesting alternative treatments, or offering opinions on the medical decisions you are making. It helps to designate one person (a partner, sibling, or close friend) as the family point of contact who can receive and filter questions. You can also prepare a brief, consistent statement: "We are being treated by a specialist team we trust, we will share updates when we have them, and what we need most right now is practical support rather than medical advice." You are not obligated to justify your treatment choices to anyone. If certain interactions are consistently draining, it is reasonable to limit contact during treatment.