RT Journal T1 CAsting light on dim JF JAMA JO JAMA YR 1969 FD October 6 VO 210 IS 1 SP 126 OP 127 DO 10.1001/jama.1969.03160270088019 UL http://dx.doi.org/10.1001/jama.1969.03160270088019 AB Hemodialysis and renal transplantation have provided many fringe benefits. In addition to prolonging life of the individual patient, they have enriched medical science with a better understanding of metabolic disorders in chronic renal failure as well as with a clearer appreciation of the kidney's role in blood formation, in blood volume and blood pressure regulation, and in immunogenesis. Not the least of these gains has been the opportunity which prolongation of life, with or without benefit of functioning kidney tissue, has presented for the study of renal handling of divalent ion metabolism (DIM) in chronic kidney failure. And the striking increase in skeletal complications from 25% to 80% consequent to hemodialysis and renal transplantation has added therapeutic challenge to the scientific quest for concepts and mechanisms.Renal osteodystrophy and metastatic calcification of soft tissue complicating disordered DIM in kidney failure are intimately interwoven with widely scattered metabolic disorders of calcium