I'm so sorry to hear abou your sister's situation. My husband was also put on TPN eventually since we could no longer get food into his system the normal way - intestinal blockage about 3 years after surgery. He ended up with a G-tube so he could still "enjoy" eating but everything was then emptied back out via the tube instead of vomiting. Neither method is a quality way of living but we did what we could to try and carry on, and he got to eat whatever he wanted, which was one simple pleasure, at least. He is no longer with me after a 4 year battle with PC and treatment including chemo, radiation, whipple, and more, but there are miracles waiting out there so never give up hope. Prayers to your family 🙂