Is there any way that someone could have kidney disease via scarred kidney tissue (not due to hypertension, diabetes or old age, but say due to a contrast agent) but with normal eGFR and creatinine results without any protein in urine? Assume various symptoms that are in line with CKD (changes to urine, foamy urine, need to urinate when waking up, fatigue, neuropathy in arms/hands and legs/feet) but which occurred within weeks of the contrast being injected but not developing in a traditional stage 1->5 due to usual causes.
Assume it’s not psycho-somatic and it is CKD with damaged kidney tissue, what could possibly explain the normal lab results? I suspect a biopsy would confirm the damage but as that’s super invasive and lab results are normal, I’d appreciate an expert’s POV on how this would be possible?