Kidney pain

Hello, a close of friend of mine had his kidney stones removed a few years ago. However, afterwards the scarring on his kidneys that was left behind, the kidney became infected. Cancer tests done on it showed a tumor, however, it went away after strong antibiotics. They said the kidney pain he recieved was because his kidney swelled up in defense of the cancer. For a while he did not get the pain; however, now he gets the kidney pain again. Why is this happening/ what does it mean?

[Dr Santos]

Hi,

How is your friend? Are there other signs or symptoms present?   I would recommend that he see his nephrologist for further evaluation. Kidney stones has a tendency to recur. Urinalysis and imaging studies such as ultrasound or CTscan may help with the diagnosis.  This is also to rule out the any  tumor residual.

Take care and regards.