Assessment of the clinical usefulness of serum ribonuclease assays: An indicator for the detection of pancreatic cancer

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Abstract
To evaluate diagnostic usefulness for pancreatic cancer, serum ribonuclease (RNase) level was determined in the three groups of subjects; 1) normal volunteers as control, 2) patients with histologically determined pancreatic cancer, and 3) patients with miscellaneous diseases other than pancreatic cancer. A small increase of RNase values was recognized with age in the normal subjects and in the patients with nonpancreatic diseases, if renal function was normal. The mean RNase level in the control subjects was 97±41.2units. A marked elevation of serum RNase level was demonstrated in the patients with pancreatic cancer (p< 0.001) and in the patients with renal dysfunction, but no significant rise was noticed in the patients with pancreatitis. Mean values of RNase in the patients with pancreatic cancer and renal dysfunction were 368±146 units and 342±78.1 units respectively. RNase values above 300 units were recognized in 15(71%)out of 21 patients with pancreatic cancer. Seven cases with elevated RNase over 300 units other than non-pancreatic malignancy and renal dysfunction were noticed in 6 instances of obstructive jaundice and in one instance of early gastric cancer (an 84-yearold male). The above-stated findings indicate that serum RNase determination can be utilized as a diagnostic indicator for pancreatic cancer.

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