Chen JE, et al. - Because accurate identification of a common bile duct (CBD) stone before cholecystectomy is of concern to surgeons, gastroenterologists and radiologists in patients with acute cholecystitis (AC), researchers assessed the usefulness of preoperative MRCP taking into account both sonographic findings and biochemical predictors for choledocholithiasis. For this investigation, 57 patients with signs of AC on right upper quadrant (RUQ) ultrasound (US) who had subsequent MRCP from 2007 to 2017 were identified using a text-based search and retrospectively analyzed, using ERCP as the reference standard. According to findings, normal or even mildly elevated bilirubin levels below a calculated threshold may obviate preoperative MRCP in AC patients who have a normal CBD diameter on RUQ US. Radiologists should be active participants in clinical decision-making; discussion between referring doctors and radiologists on biochemical markers and sonographic findings will lead to better use of preoperative imaging.