“…Despite the high accuracy of the modern US and other diagnostic imaging techniques, the preoperative diagnosis of AGB has been considered extremely difficult and nearly all diagnoses on symptomatic patients are made at laparotomy or during attempted laparoscopic cholecystectomy [27] . Although ideally AGB should be diagnosed before surgery, this has been documented in only few reports [6] , [7] , [8] , [9] , [10] , [11] , [12] , [13] , [14] , [15] . This is mainly because the radiological investigative methods for GB diseases present sensitivity of <100% for the identification of the GB, and US is highly operator-dependent [24] , [26] .…”