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In medicine, a
family history consists of information about disorders that a patient's
direct blood relatives have suffered from. Genealogy
typically includes very little of the medical history of the family, but the
medical history could be considered a specific subset of the total history
of a family. Uses Although often
neglected, many doctors glean information on family morbidity of particular
diseases (e.g. cardiovascular diseases, autoimmune disorders, diabetes,
cancer) to appreciate whether a person is at risk for developing similar
problems. Family
histories may be imprecise because of various possible reasons: - Adoption or
illegitimacy
- Lack of
contact between close relatives
- Uncertainty
about the relative's exact diagnosis
In complex
situations, a family tree may be necessary to cover the necessary aspects. Consequences Not all
positive family histories imply a genetic cause. If various
members of the same family have been exposed to the same toxin, then they
may develop similar symptoms without a genetic cause. If a patient
has a strong family history of a particular disorder (or group of
disorders), this will generally lead to a lower threshold for investigating
symptoms. In diseases
with a known hereditary component, many healthy people are now tested early
to prevent the symptoms from developing. This has become
accepted in cystic fibrosis, hemochromatosis and various other disorders. |