Yesterday I went into A&E for a totally unrelated issue and ended up getting an abdominal CT scan with contrast. The issue I went in for ended up completely fine, however, incidentally the scan showed a small amount of fluid in the rectovesical pouch. They did a consult with surgical team and said that I can go home that it's not an emergency and that they'd call me in the morning next day after they've consulted with radiology and gastro what I should be doing next. Obviously at home I checked the issue they found and found that in males this is where any abdominal fluid would collect and it mentioned it can be either ascities or pus or blood but I don't think they'd send me home with pus or blood. They said the amount was small and only detectible on CT (not on a physical exam). What really has me worried is that after looking up what can be the cause it seems there are two major causes - alcoholism-related liver cirrhosis and advanced stage cancer. I don't drink so that mostly leaves the latter. The CT didn't show any obvious tumours, I also had a ultrasonography, upper endoscopy (esophagus, stomach, duodenum examined), a colonoscopy (entire colon + ileum) and a contrast CT about 6 months ago as part of my IBD screening and those didn't show any tumours, could a tumour have grown in 6 months or just been missed on all those tests? I'm really worrying I might be facing a prospect of having like 3 months left to live.