[Meanon]

I'd make a brief comment that I was sorry to hear the news and not comment further unless they made it clear they wanted to talk about it, in which case I may offer a hug and sympathy. I've been in this situation a few times. People are so different, some want to discuss all the details and receive comfort. Others need to retain a sense of normailty and being in control, fear the embarrassment of getting upset and find it harder if people constantly express sympathy. It's useful if a close friend can talk to them about what helps.