I have mctd (lupus, scleroderma and polymyositis) and had stage 2 kidney disease. The diagnosis was proteinuria and I ballooned up 2 times with 15 lbs due to edema in just a few days. The nephrologist treated me with lisinopril and got things in line within a few months. My kidneys function totally normally and I still take a low dose to make sure they continue to function properly. I was lucky that my doctors were so observant and aggressive. No problems today.
Bill