The outline of the materials to be covered in this section:

1. Imaging Modalities
   1. Ultrasound
   2. ERCP, PTHC, and MRCP
   3. CT


2. Anatomy of the Gallbladder and Bile Ducts
    
3. Gallbladder Disorders
   1. Inflammatory Diseases: cholelithiasis and emphysematous cholecystitis.
   2. Neoplastic Diseases: porcelain gallbladder and gallbladder cancer.
       
4. Bile Duct Disorders
   1. Inflammatory Diseases: chronic pancreatitis, choledocholithiasis, and pseudocalculus defect.
   2. Infectious Diseases: ascending cholangiits, primary sclerosing cholangitis, and ascariasis. 
   3. Congenital Diseases: choledochal cysts, Caroli's disease, and biliary tract anomalies.
   4. Neoplastic Diseases: cholangiocarcinoma and ampullary carcinoma.
   5. Iatrogenic Diseases 
      
      
5. Quiz
    
6. References