I am relatively new to this. I am 22 yrs old. My half-sister's father has today been diagnosed with stage 4 cancer that has spread from the lungs to the brain. I am finding it difficult to research the Internet for answers as to what this exactly means. And I am really concerned about my sister who is really struggling at the moment. I need to know how to deal with the situation and how to handle her at the moment. Can anyone give me a site to look at or answer the otherwise answer these questions?Thank you for your responses...