Remembering that an uncle had heart trouble is different from knowing his diagnosis or how old he was when it happened. A grandparent’s cancer treatment might be familiar family history, while the type of cancer remains unclear.
A useful family medical history turns those fragments into clear notes for your GP. Aim for an account of what you know, with the gaps visible, rather than an exhaustive family archive.
Start with both sides of the family
Begin with your biological parents, siblings and children, then add grandparents, aunts and uncles where information is available. Identify your mother’s and father’s branches, and make relationships such as half-siblings clear. Look beyond the relatives you know best.
If a father, brother or uncle has had breast cancer, record it alongside diagnoses in female relatives; information on Male Breast Cancer can help you understand an unfamiliar diagnosis.
Keep the scope broader than cancer. Heart disease, stroke, diabetes and other diagnosed conditions belong in the record too. A questionnaire from your practice provides a starting point, particularly if you are unsure what to ask about.
Record a few useful details
A notebook or simple spreadsheet is enough. Give each relative a separate entry, using the same fields throughout:
- Their relationship to you and family branch.
- The condition or diagnosis.
- Their approximate age at diagnosis.
- Who supplied the information.
- Any details that remain uncertain.
For example, Carronbank Medical Practice’s registration questionnaire asks about selected conditions in parents or siblings, with further prompts about the age at which heart disease occurred and the type of cancer. Follow your own practice’s questions when completing its form.
A fictional entry might read: “Mother’s brother: heart attack in his early fifties; information supplied by my mother; exact age unknown.” Record that age range as an estimate, rather than guessing a precise date.
Keep the age when symptoms began separate from the age at diagnosis. For relatives who have died, add their age at death and the cause, if known, keeping these distinct from earlier illnesses. Record your own diagnoses in a separate section so they are easy to distinguish from relatives’ conditions.
Ask relatives without putting them under pressure
Choose a private conversation instead of raising sensitive health details in a family group chat. Explain why you are asking. You could say: “I’m putting together some family health information for my GP. Would you be comfortable telling me about any diagnoses you’ve had and roughly how old you were?”
Some relatives will remember a condition but not the year; others will prefer to keep their health information private. Respect either response. A brief written note might suit someone better than a conversation, but sharing medical documents should remain their choice.
Check before passing details to other family members, and store the record privately. Focus your working notes on relationships, conditions and ages. Full addresses and dates of birth are unnecessary unless specifically requested for a relevant purpose.
Make missing and uncertain information clear
Use consistent labels. “Unknown” means you have no information. “Not confirmed” identifies a reported condition whose details remain unverified. “No known diagnosis” describes your current knowledge, rather than establishing that a condition never occurred.
Where relatives give conflicting accounts, preserve the uncertainty. “Cancer type unclear” is more accurate than choosing a diagnosis based on someone’s recollection of treatment. Note who provided each account so you can revisit it if clearer information emerges.
Adoption, estrangement and lost family contacts can leave substantial gaps. Explain the circumstances to your GP and bring what you have; completing a form need not involve reopening difficult relationships. If a questionnaire offers only yes or no, add an explanatory note or ask the practice how to record an unknown history.
Prepare a short summary for your GP
Bring a concise version organised by relative, rather than pages of family messages. Highlight new information since your last appointment and any entries that need clarification. Keep current symptoms and your own medical questions separate so they remain easy to find.
A relative’s diagnosis does not establish that you will develop the same condition. Ask your GP what the information means for your care and whether any further details would help.
Date the summary and update it when new information becomes available. If you have symptoms now, seek advice without waiting to finish collecting family details.
