Hi, welcome to our site. I am Dr Saumya Mittal, MD.
Read your query. That is a very significant question and i appreciate your problem. I will try my best to answer your query
I will agree completely with your brother's condition. I must say that the non functional
kidney should be removed as soon as possible.
With the diabetic status, there is a high possibility that he has developed some kind of infection in the kidney that needs to be removed.
Therefore I would suggest that you have his urine routine, urine culture and the
ultrasound abdomen tested again. This may help you toll locate the infection. An antibiotic may be prescribed accordingly.
I hope this helps you. Inform the reports mentioned above/if any other so I can be of help further.
I have given you the answer to the maximum considering the information provided. The results of the tests could further enhance my answer to you.
Please do understand that some details could be extracted from a detailed history and examination.
Please feel free to ask another query. I would be glad to help you. Looking forward to your return query with the details asked so that I can help you further.
(If the answer has helped you, please indicate this)
Best of luck.