A good reason to create your own medical family tree is to help ascertain your genetic tendency towards certain diseases, genetic traits and more. If not for yourself then for your descendants.
I have started my own tree for medical reasons, I have put this medical tree together as a temporary measure for all descendants of (William Sidney George Male) this includes my son and daughter brothers and sisters.
There appears to be a pattern (although always told) there was no existence of this within my family, if I am correct everyone is affected as a descendant of this tree (and should) seek medical advice and regular checkups with their GP, this should start around the age of 35 years, any signs of bowl problems should be investigated immediately, however as in Paul's case (kidney infection) there was no warning! I am not a doctor but the evidence itself is pretty damming and strongly advise all my relations of this tree to get themselves checked out, it appears at present only the male side of the equation is affected, quite ironic as the maiden name is male? However I would not rule out females just on this basis!
I hope to improve the tree over time and add all permutations but at present this part is most important.