my dad is 80 and he only has 25 to 30% of his kidneys working,doesnt want to do anything about it.He has lost 50 pounds in the last 5 months.he went from a 46 inch waist to a 36 inch waist.he does get around and still drives,do we have to be worried about him.thank you.
Such a severe weight loss in a span of 5 months definitely needs further evaluation. Common causes are tuberculosis hyperthyroidism and any cancer. Renal failure induced loss of appetite leading to weight loss is also possible but such a severe weight loss is very rare. Regarding kidney condition, don't worry. At age 80 with the mentioned Renal function, he can lead the life without dialysis for 2-3 years. I believe that your renal failure and weight loss are related and proper evaluation and treatment may lead to improvement of your Renal function. Consult general physician/nephrologist for further evaluation. All the best. If you have any questions feel free to consult me.