Thank you for the post.
You say that the CT scan report said there was 'lymphadenopathy', but there is no mention of which group/groups of lymph nodes were seen to be enlarged.
In salmonella enteritis, apart from the diffuse wall thickening typically seen in the ileum(salmonella ileitis), there are frequently, enlarged "regional" lymph nodes-usually the mesenteric nodes, and at times, the periportal lymph nodes.It is very unusual to have enlarged lymph nodes near the kidneys due to a salmonella enteritis.
Your urologist naturally, would prefer to wait and see if the nodes would subside with the treatment for salmonella enteritis (they are likely to), before attributing the nodes to the renal 'mass'.
MB BS, MS, FRCS(Edinburgh)