yah, sometimes, there is no family history of cancer in the family at all ( Dr Teo's case - no family history )...he was a social smoker and his cancer was due to " mutation" of the cells and it spread like wide fire....
so life is very very fragile...please learn not to sweat the small stuff....and please be kind and gentle to your fellow travellers..we are all in it together...help each other....share our love, share our hardships, share our blessings, share our wealth....be kind to yourself and also be kind to others ( even in cyberspace ).....you never know...good night bang