胆石症における血清CA19‐9の臨床的意義について

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  • Studies on clinical significance of serum CA19-9 in patients with cholelithiasis.

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Serum CA19-9 levels were measured using radioimmunoassay in 45 patients with cholelithiasis and clinical significance of serum CA19-9 was discussed. Results obtained were as follows:<br>1) Positive rate over cut off level of CA19-9 (>37U/ml) was 27.6% in patients with cholecystolithiasis and 68.8% with choledocholithiasis.<br>2) Positive rate of serum CA19-9 was high in patients with clinical symptoms such as cholecystitis, cholangitis and obstructive jaundice. The highest titer of CA19-9 was 2350U/ml in a patient with obstructive jaundice.<br>3) High titer of serum CA19-9 was improved in patients with cholecystolithiasis after subsidence of cholecystitis.<br>4) There was positive correlation between serum total bilirubin and serum CA19-9 in patients with choledocholithiasis. High titer of serum CA19-9 was normalized in all cases after improvement of obstructive jaundice.<br>It is suggested by these results that CA19-9 is secreted into bile and this antigen flows back into blood in situation of cholecystitis or obstruction of bile duct.

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