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Intra and extrahepatic bile ducts are dilated and CBD measured 15 mm in caliber. A 10 mm low signal filling defect is present at distal third of CBD inferring stone.
A 48mm parapelvic cyst is present at right kidney.
Magnetic resonance cholangiopancreatography (MRCP) has largely replaced ERCP as the gold standard for diagnosis of choledocholithiasis, able to achieve similar sensitivity (90-94%) and specificity (95-99%) without ionizing radiation, intravenous contrast, or the complication rate inherent in ERCP.