Kristen’s Ethical Doctor Dilemma Divides Callers

Kristen was at a dinner and a family friend ask a 'What would you do in this scenario?' type of question. The story goes... your a doctor and you've been seeing a patient for a long period of time. The patient has a cough and you do some tests, which resulted in a serious lung cancer diagnosis that is incurable. The patient is about to go on holiday with family and friends. So do you tell her before she goes away or do you tell her at that time?