My husband has lung to ours plus nodules? And also a small amount of PCa in his pelvi. He has been monitored by regular scans but now has a letter saying that his next appointment would be a contrast CT. I just wondered what the difference was tbetween that and a standard scan and why. It has been about two year since his lung tumour was found after a break from hormone therapy but no growth after re starting hormone therapy. He also had his prostate removed 8 years ago and that was followed by a bout of. Radiotherapy. I am very worried about this last development but he won't talk about it says not to worry . I guess it is because I had a stroke last year so he is protecting me.