Most sensitive investigation of pancreatic carcinoma is -

With early chronic pancreatitis, and even in some patients with advanced disease, ductal abnormalities demonstrated by ERCP may be minimal. CT scans provide the most precise information about the size and configuration of the pancreas, information that is used in decisions regarding possible pancreatic resection. ERCP has a sensitivity of 95 percent but a specificity of only 85 percent. This is due to the difficulty in distinguishing between cancer and chronic pancreatitis. The study can be performed successfully in over 90 percent of patients and detects some tumors that are not visualized by CT. ref: Schwartz 7 ed