28 CFR 79.67 - Proof of chronic renal disease.
(a) In determining whether a claimant developed chronic renal disease following pertinent employment as an ore transporter, the Assistant Director shall resolve all reasonable doubt in favor of the claimant. A conclusion that a claimant developed chronic renal disease must be supported by medical documentation.
(1) Pathology report of tissue biopsy;
(2) If laboratory or radiographic tests exist:
(i) Abnormal plasma creatinine values;
(ii) Abnormal glomerular filtration rate (by either measured creatinine or iothalamate clearance or calculated by MDRD equation); and
(iii) Renal tubular dysfunction as evidenced by:
(A) Glycosuria in the absence of diabetes mellitus;
(B) Proteinuria less than one gram daily without other known etiology; or
(C) Hyperphosphaturia, aminoaciduria, B-2 microglobinuria or alkaline phosphaturia or other marker of proximal tubular injury; or
(iv) Radiographic evidence of chronic renal disease;
(3) Autopsy report;
(4) Physician summary report;
(5) Hospital discharge summary report;
(6) Hospital admitting report; or
(7) Death certificate, provided that it is signed by a physician at the time of death.