I really feel <span style = 'background-color: #dae8f4'>for</span>
you and Sadie. I had a beloved 16 year old cat that had intestinal lymphoma
. My cat, too, displayed no symptoms until I took him to the Vet, and she felt a mass. I eventually got him to a specialist Vet in Internal Medicine. Yes, it will take an ultrasound and biopsy to diagnose it. My kitty's lymphoma
was widespread, but , considering his age, he did fine for
a while on a treatment plan. How old is Sadie?