The Usefulness of the Alpha-Retroflex Position in Biliary Cannulation on Single-Balloon Enteroscopy-Assisted Endoscopic Retrograde Cholangiopancreatography in Patients with Roux-en-Y Gastrectomy: A Retrospective Study

Figure 3

(a) Fluoroscopic and (b) endoscopic findings in the J-retroflex scope position (J-position). Here, the J-position provided an en face view of the papilla.

(a)

(b)