One of our cats, Hamilton, went in for an ultrasound and some needle aspirate biopsies yesterday. So far, so good...nothing showing lymphoma. Hamilton is 14 and has lost some weight recently, and now we're hopeful that it is just ongoing long-term kidney disease, something that can be managed with diet and subcue fluids. We're waiting for the results of a couple of more tests to be sure he doesn't have pancreatitis or something else that might be causing inflammation or other issues.
It's so tough watching them age and worrying that they won't be around forever.