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From the RSNA refresher courses: imaging evaluation for acute pain in the right upper quadrant Hanbidge AE; Buckler PM; O'Malley ME; Wilson SRRadiographics 2004[Jul]; 24 (4): 1117-35Acute cholecystitis is the most common cause of acute pain in the right upper quadrant (RUQ), and urgent surgical removal of the gallbladder is the treatment of choice for uncomplicated disease. However, cross-sectional imaging is essential because more than one-third of patients with acute RUQ pain do not have acute cholecystitis. In addition, patients with complications of acute cholecystitis, such as perforation, are often best treated with supportive measures initially and elective cholecystectomy at a later date. Ultrasound (US) is the primary imaging modality for assessment of acute RUQ pain; US is both sensitive and specific in demonstrating gallstones, biliary dilatation, and features that suggest acute inflammatory disease. Occasionally, additional imaging modalities are indicated. Computed tomography is valuable, especially for confirming the extent and nature of the complications of acute cholecystitis. Magnetic resonance cholangiopancreatography is helpful in complicated ductal disease (eg, recurrent pyogenic cholangiohepatitis) when more detailed diagnostic information is required for treatment planning, whereas endoscopic retrograde cholangiopancreatography is used when biliary intervention is required (eg, treatment of choledocholithiasis). Successful imaging with all modalities requires familiarity with both the characteristic and the unusual features of a wide variety of pathologic conditions. In addition, potential pitfalls must be recognized and avoided.|*Diagnostic Imaging/methods[MESH]|Abdominal Pain/diagnostic imaging/*etiology[MESH]|Acute Disease[MESH]|Adult[MESH]|Aged[MESH]|Aged, 80 and over[MESH]|Aneurysm/diagnostic imaging[MESH]|Cholangiopancreatography, Endoscopic Retrograde[MESH]|Cholangiopancreatography, Magnetic Resonance[MESH]|Cholangitis/diagnosis[MESH]|Diagnosis, Differential[MESH]|Digestive System Diseases/complications/*diagnosis/diagnostic imaging/pathology[MESH]|Duodenal Obstruction/diagnostic imaging/etiology[MESH]|Female[MESH]|Gallbladder Diseases/diagnosis/diagnostic imaging[MESH]|Gallstones/complications/diagnostic imaging[MESH]|Hepatic Artery/diagnostic imaging[MESH]|Humans[MESH]|Liver Abscess/diagnosis/diagnostic imaging[MESH]|Liver Neoplasms/diagnosis/diagnostic imaging[MESH]|Male[MESH]|Middle Aged[MESH]|Rupture, Spontaneous[MESH]|Tomography, X-Ray Computed[MESH]|Torsion Abnormality/diagnosis[MESH]|Ultrasonography[MESH] |
