Question: what to say to someone who was diagnosed with breast cancer?
Answer: Be available to listen. Let your friend know that you're available to come over when needed. ... 
Let her know if you don't mind taking a call from her in the middle of the night. ... 
Just be yourself. ... 
Let her know you care. ... 
Phone her, but be respectful of her needs. ... 
Visit, but phone first to check it's okay.