Lung cancer new diagnosis

Hello, I’m posting this on behalf of my friend as we are both in complete shock with her recent diagnosis. My friend woke up on Easter Sunday with a pain in her shoulder and feeling unwell, during the day she felt worse and went to A&E and they did bloods tests and X-rays, it was then they said they could see a shadow in her left lung, and they thought she could have pneumonia and that she would be referred for a scan to see if she had any blood clots. She went to the hospital again on 2nd of April and was given a scan, the dr told her that they think she had lung cancer in her left lung and that more tests would be needed, since she has had pet scans and CTScans and was told on the 12 April that they feel it is stage 2 and that they could operate to remove them, she had a biopsy on 16 April and another pet scan and had another appointment on 26 April to go through treatment, the doctor informed her that the scans had shown 1 small patch in her right lung, 2 small patches in her lower left lung, 1 small patch at the top left lung, 2 small patches on the left side of her left lung and a small patch on her upper liver, she asked if she could have surgery to remove them and he said “the would be able to remove the majority but the issues would be the 2 small patches at the left side of the left lung as these are just under the skin like cling film, and it would be an insult to the body’ and that more scans would be needed to determine what stage this is but most likely stage 4 now. I’m devastated as she is and she is really scared as she has 4 children with the youngest being 13, she is 46 years old and we just don’t know what to think especially with the doctor saying it would insult the body, does anyone know what this means or been in a similar situation? Thank you for reading this, and wish you all well.