hepatic and biliary disorders
Acute Cholecystitis
Acute acalculous cholecystitis
Acalculous cholecystitis is cholecystitis without stones. It accounts for 5 to 10% of cholecystectomies done for acute cholecystitis. Risk factors include the following: Critical illness (eg, major surgery, Burns , Prolonged fasting or total parenteral nutrition, both of which predispose to bile stasis Shock None Immune deficiency Overview of Vasculitis (eg, systemic lupus erythematosus [ species or Cytomegalovirus (CMV) Infection in immunodeficient patients). In young children, acute acalculous cholecystitis tends to follow a febrile illness without an identifiable infecting organism. 