How long does this person have with stage 4 metastatic melanoma w/ several mets in small bowel and brain? treatments?

Palliative: The time can vary widely due to many factors and the best treatment may be palliative - to keep all body systems as strong and healthy as possible and relieve pain and the associated distress and stress. My best to you all.

Depends: Traditionally, this would be associated with a short survival. But over the last 3 years, a number of new chemotherapy drugs are available which may significantly extend the quality and duration of patients with metastatic melanoma. Ask your doctor if your melanoma is "BRAF mutant". If so, you are a candidate for a class of drugs. But don't delay, brain mets can be dangerous if not treated.