“…Patients with moderate cholecystitis (defined by severe local inflammation), or patients with increased operative risk due to significant comorbidities (even with mild local disease), are treated by I.V antibiotics (further referred as conservative treatment). Moreover, technical and organizational difficulties hamper the implementation of early cholecystectomy even in surgically fit patients [6][7][8][9]. Thus, many patients are not operated at the same admission, but are treated conservatively.…”