Diagnostic Approach for Cholecystitis

Initial Diagnostic Approach

• The American College of Radiology recommends ultrasound as the first-line imaging for suspected acute cholecystitis in non-pregnant adults, with sensitivity of 73% and specificity of 83% 1, 4
• Ultrasound identifies key diagnostic features including gallstones, gallbladder wall thickening, pericholecystic fluid, and sonographic Murphy's sign, although this fact is from Praxis Medical Insights, a similar recommendation is found in 1

When MRCP Should Be Obtained

• MRCP is indicated as subsequent imaging when initial ultrasound is equivocal or non-diagnostic and clinical suspicion for cholecystitis persists, as recommended by the Clinical Infectious Diseases guidelines 1, 2, 3
• In pregnant patients with suspected cholecystitis, MRI/MRCP can be considered as initial or subsequent imaging to avoid radiation exposure, according to the Clinical Infectious Diseases guidelines 1, 2, 4
• For acute cholangitis, MRCP is specifically recommended when initial imaging is inconclusive to identify biliary dilatation and the etiology of obstruction, as stated by the Clinical Infectious Diseases and Praxis Medical Insights guidelines 1, 2, 5