Salivary gland involvement in patients with chronic pancreatitis.

The salivary glands are structurally similar to the exocrine pancreas and may be involved in the course of diseases of autoimmune origin (sclerosing cholangitis, ulcerative rectocolitis, primary biliary cirrhosis). For a not-yet-quantified proportion of chronic pancreatitis (CP) cases, a possible autoimmune pathogenesis has been postulated. The aim of the study was to assess the frequency of salivary ductal system abnormalities in patients with CP. Fifty-one patients with CP consecutively admitted to our center were studied (44 men, seven women; mean age, 48.2 +/- 10.8 years). The mean duration of disease was 11.7 years (range, 1-37 years); 44 (86%) of 51 patients had pancreatic calcifications, 25 (49%) of 51 diabetes, 25 (52%) of 48 steatorrhea, and 32 (63%) of 51 underwent pancreatic surgery. As a control group, we studied 10 patients of whom four with liver cirrhosis (three alcoholic and one posthepatitis; three men, one woman; mean age, 57 +/- 12.5 years), and six with temporomandibular pain (five men and one woman; mean age, 42 +/- 10.3 years). The patients were given parotid sialography, the findings being read by two independent observers. In two CP patients, parotid sialography was unsuccessful. Fifteen (31 %) of 49 patients and none of the 10 control patients exhibited abnormalities of the glandular ducts compatible with chronic inflammation of the salivary ducts (p = 0.039). None of the CP patients had salivary intraductal calcifications. Findings of parotid ductal abnormalities are frequent in the course of CP and may indicate a common pathogenetic mechanism, even of an immune type.