a patient with hypoparathyroidism and a markedly decreased serum concentration of magnesium ( 0.7 meq/liter ) , but a normal red blood cell magnesium level , is described who increased serum calcium concentration and decreased per cent renal tubular reabsorption of phosphate when parathyroid extract was given .
C0020626
hypoparathyroidism
C0030520
parathyroid extract