Yes, xrays are useful tools in diagnosing a lump or tumor. how
ever, it can't end there, they will need to <span style = 'background-color: #dae8f4'>do</span>
other tests such as a needle biopsy and/or a <span style = 'background-color: #dae8f4'>cat</span>
scan to really tell what's going on.
Luckily, you are obviously on top of your cat
s medical care. There are a variety of treatments available with these types of situations, just like with people. It's hard for me to speak on this specifically, since the only information I have is "tumor", not what kind, etc.