I'm Rachel, one of the nurses that works on the support line. I just wanted to respond to your post to welcome you to the forum, I do hope that you'll find valuable support here.
I am sorry to hear of your SIL's diagnosis of pancreatic cancer, I imagine this must be a very anxious time for you all.
We do often hear of pancreatic cancer spreading to the lungs unfortunately so I'm not completely clear in what context your SIL's Oncologist is speaking. If you did wish to chat about this a little further then please don't hesitate to give us a call - details are in the signature below, you're also very welcome to email also.
I do hope that your SIL's condition improves soon.
Pancreatic Cancer Specialist Nurse
Pancreatic Cancer UK
support line: 0808 801 0707