The first stage of grieving is shock. A person does not believe the news, and essentially becomes numb. Talk to someone about the news and their feelings. The person with the diagnosis and the family should share their feelings with each other if possible and with other family members. It may be helpful to use expert listeners, such as trained clergy, mental health counselors, social workers and nurses.
Support groups are wonderful helps.
Be with people they love who can provide support. Empathy goes a long way. Be encouraged to keep lists of schedules, noted of callers and appointments marked on calendars. It's easy to forget things during this stage of grief. Reminders can be very helpful.