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Cholangioscopic view of a large stone. A: The stone could not be removed during prior endoscopic retrograde cholangiopancreatography. A plastic stent was placed and the patient was referred for cholangioscopy-guided laser lithotripsy. Impression of the plastic stent in the stone is clearly visible; B: Cholangioscopic view of the same stone after laser lithotripsy. The laser probe is seen in the left lower corner of the picture.
