Background/aim: The incidence of acute cholecystitis (AC) increases with age, and aging is also one of the poor prognostic factors. Aging is related to altered physiology, so diseases may show different characteristics in elderly patients. We aimed to investigate the differences between the main characteristic features of AC in elderly and nonelderly patients. Materials and methods: In this retrospective study, patients who had a diagnosis of AC were included and divided into two groups of people aged