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Risk Factors of Chronic Pancreatitis

Chronic pancreatitis (CP) still remains a challenging clinical problem with many controversial issues regarding pathogenesis, outcome, and treatment. The disease comprises a spectrum of disorders that culminate as a final step in the destruction of the pancreas. Complex interaction does exist between genetic, environmental and immunologic factors leading to development of the disease. Multiple risk factors interact in a multiple-step model; the pancreatic injury may occur through different mechanisms with transition between an acute pancreatitis condition to recurrent pancreatitis and, finally, to CP. Most patients have multiple risk factors and the overall risk is a product of all risk factors in additive or multiplicative fashion. Susceptibility to develop CP in alcoholics depends on the expression of single gene mutation or is derived from complex genetic polymorphism; in addition, smoking habit can influence the risk of pancreatic calcifications and severity in alcoholic and idiopathic CP. Alteration of the immune response induced by gene mutations and/or environmental factors represents the main determinant of pancreatic fibrosis, the end-stage histologic feature from all CP etiologies.