The document outlines common pathological lesions found in the gastrointestinal tract, liver, gallbladder and pancreas. It describes lesions such as pleomorphic adenoma of the salivary gland, esophageal squamous cell carcinoma, peptic ulcer, gastric carcinoma, intestinal tuberculosis, amebic ulcer, Crohn's disease, ulcerative colitis, adenomatous polyps, colorectal adenocarcinoma, acute appendicitis, fatty change of the liver, cirrhosis of the liver, hepatocellular carcinoma, cholelithiasis, chronic cholecystitis, adenocarcinoma of the gallbladder, cholangiocarcinoma, serous and mucinous cystadenomas of