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Clinical Chemistry 26: 1821-1824, 1980;
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Clinical Chemistry, Vol 26, 1821-1824, Copyright © 1980 by American Association for Clinical Chemistry

Radioimmunoassay of creatine kinase B-isoenzymes in serum of patients with azotemia, obstructive uropathy, or carcinoma of the prostate or bladder

HA Homburger, SA Miller and GL Jacob

We measured the concentrations of creatine kinase B-isoenzymes by radioimmunoassay in 271 serum specimens from patients with azotemia, benign prostatic hyperplasia, adenocarcinoma of the prostate, and transitional cell carcinoma of the bladder. There was no correlation between the concentrations of B-isoenzymes and creatinine in the sera of azotemic patients. Above-normal concentrations of B-isoenzymes were found in sera from three patients with acute renal failure, but in only two of 28 specimens from patients with chronic renal failure. Above- normal concentrations of B-isoenzymes also were found in sera from three of 18 patients with untreated carcinoma of the prostate, 10 of 25 patients with treated carcinoma, 20 of 135 patients with benign prostatic hyperplasia, and 10 of 33 patients and with transitional cell carcinoma of the bladder. An above-normal concentration of B-isoenzymes in serum has a low predictive value for adenocarcinoma of the prostate, was not a sensitive indicator of the presence of carcinoma, and was noted paradoxically in six patients with treated carcinoma who had normal acid phosphatase activities in serum. We conclude that routine measurement of B-isoenzymes is not useful to establish the diagnosis of adenocarcinoma of the prostate.




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Copyright © 1980 by the American Association for Clinical Chemistry.