Studies on secretory component in digestive disease. III. Levels of serum secretory component in digestive disease.

The levels of serum secretory component (SC) were measured in 147 patients with digestive disease. Decreased levels were found patients with acute hepatitis, HBs-antigen associated chronic hepatitis, HBs-antigen associated liver cirrhosis and hepatoma. Normal levels were observed in patients with diabetes mellitus, gastric cancer and colonic carcinoma. Elevated levels were found in patients with cholecystitis, obstructive jaundice and acute pancreatitis. The serum SC level in almost all disease groups showed no correlation with immunoglobulin levels.