My 16 year old cat has had hyperthyroidism for the last 5 years. She was on tablets until thyroxine levels became too high and then she had one side of her thyroid removed. She was fine until about a year ago when I noticed weight loss. She had a blood test and thyroxine levels were up again so she is back on 1 pill per day. She put weight on and seemed happy. A couple of weeks ago I thought she was looking a bit thin so I took her back to the vet. The vet did a full biochemistry. I got results this morning. Hyperthyroidism under control, but her liver enzymes are high and white blood cells low. The vet says this indicates a lympphoma. Prognosis - months. Treatment - steroids but only when she has loss of appetite as steroids can make her liver uncomfortable. He said he could do an ultrasound of her liver but I don't know if it is worth it to put her through the stress. Any help/comments would be useful. Many thanks.