Hello, forum

My Mum has recently been diagnosed with a rather aggressive form of cancer without it being named or identified fully. Previously she had lung then breast cancer but this one,12 years later, is a bit different. She is currently back home in Ireland and well looked after by family and a palliative care team. Has anyone any experience of a Cancer returning and having to quickly move on IV Chemotherapy without a definitive statement of what it is? The rush to start  IV Chemo after the biopsy was quite sudden and I have yet to find out what cancer it is, the stage, term plan, etc. I imagine it's very jarring for her as it's been so fast to jump into Chemo without a clear statement of what we are dealing with.

It's such a whirlwind for her that the information must be hard to process as well as the therapy herself. I feel it's rather pointless trying to work out what cancer it is as google is not the most bright of environments to search for info. With a little bit of a biological background, all signs point towards Pancoast tumor given that before she went into hospital she showed physical signs of Horners Syndrome. And , as we manage this situation the flow of info around the family is limited if not a little muddled. She started on 3 days of IV chemotherapy (4hr sessions) and then will move to oral Chemotherapy when she returns home. Again, trying to work out the type and stage of cancer from these pieces of info is a challenge. Her medical team is great but it's the weekend so getting a chance to get a definitive clear response and plan probably won't come until next week. 

I suppose with all this in mind, does this ring any bells for anyone? Thank you in advance