Dutch Cholecystitis Snapshot Study

Inclusion Criteria

• •All patients \>18 years with a calculous cholecystitis as primary reason for their hospital admittance. Location of diagnosis may the emergency department, the ward during admittance for diagnostics, or during diagnostic laparoscopy. Cholecystitis is defined according to the TG18 diagnostic criteria for a definitive diagnosis of cholecystitis: A. Local signs of inflammation (Murphy's sign and or RUQ mass/pain/tenderness) + B. Systemic signs of inflammation (Fever, elevated CRP and/or elevated WBC count) + C. Imaging findings characteristic of acute cholecystitis. Patients with a suspected diagnosis (one item in A + one item in B + C), of which the diagnosis is confirmed by peroperative findings, are also included. Patients will be identified by a local study investigator, e.g. a surgeon or surgeon in training.