i lost my mother to pancreatic cancer in 1979. my sister who is 65 has been fighting it for 15 months. she just finished 25 rounds of radiation and chemo in pill form. she has stayed in severe pain for the majority of the time. her biggest problem is low blood pressure and dehydration. A CAT scan is scheduled in about 4 wks. to see if the tumor has shrunk. She also had a malignant tumor in her lung, very small. What is causing her low blood pressure. Thank you for your help