Can 2 ct scans , 4 us during last 4 years picked up liver cancer? ruq pain since 2007 and no diagnosis yet, would i be dead by now if it was cancer in 08?

Probably not cancer: 5 years of pain unlikely to be cancer, and certainly a liver tumor would grow enough in 4-5 years to show up on imaging studies. If you have been having unexplained pain for 5 years and nothing shows on ct or us, you may need endoscopy and/or nuclear studies to look at other possibilities (gallbladder, pancreas, bile ducts, intestines, etc.) - consult with a GI doc if you haven't done so already.

Yes and maybe.: Ct and us are both sensitive at detecting cancer. If they haven't seen it on the 6 combined studies it is unlikely to be a problem and is certainly not causing discomfort since any cancer large enough to produce that would certainly be visible. If you had primary or even worse - metastatic - liver ca in 2008 it is very likely you would have passed by now.

Not necessarily: If the liver cancer were small, it might not be visible, but statistically speaking, if it were liver cancer and was first detected in 2008, your survival chances 4 years later, depending on the type of tumor, would be poor.