The quantities of total and free guanine, adenine, hypoxanthine, and six of their methylated derivatives and of 6-succinoaminopurine have been measured in urine speci mens from cases of hepatocellular carcinoma and cirrhosis of the liver, and from normal subjects. Total base was defined as the sum of the free purine plus the increment released by means of acid hydrolysis. Analyses were per form...
