Hello Katara, You are right,there are three stages in Multiple Myeloma. In Stage 4 for other cancers, as you know, the cancer has metastasized (or spread) to other parts of
the body and has entered other organs. What I'm concerned about here is that she doesn't understand what her total diagnosis is. If she in fact has another kind of cancer that has has 4 stages, her care may need to be different. Often, patients may not be fully listening -- whether they are in shock, upset, or just have hearing challenges. Can you ask her for permission to have her nurse share the diagnosis and proposed treatment with you? You can be more help to her when you have the proper information. Good luck.