My Dad is having severe stomach discomfort, nausea, generally feeling unwell and losing weight rapid. He was 19 stone 3 pounds and in 6 months he is now 16 stone 6 pounds (he has been actively trying to lose weight). Dad is a Type II Insulin Diabetic and has a complexed history of spinal osteomyelitis. Dads insulin has been cut down more than half also he was on a very high amount Dad has a gastroscopy which has come back unremarkable just showing fundal cystic polyps. Biopsies were taken but there are no abnormalities. To be safe they have referred him for a CT scan of the thorax, abdomen and pelvis. I am really worried my Dad has cancer. What else can it be and if it was cancer would the biopsies of detected it. Dad has had 12 months of Augmentin antibiotics but now osteomyelitis is under control these have now stopped. Can his problems be due to long term antibiotics and/or his Diabetes? Dads Diabetes is now in control and has been uncontrolled for many years but it is finally under control Dad does currently have shingles so can this interfere with his appetite. I am so upset it maybe cancer but all tests up to now are negative (so hopefully this is good)