Successful cold polypectomy for ectopic endometriosis in a narrow distal bile duct using a new slim cholangioscope

Fig. 2 The polyp on imaging.a, b Fluoroscopy revealed the polyp (yellow frame shows enlarged view).c We confirmed the absence of tumor vessels using the slim cholangioscope. Fig. 3 Polypectomy procedure.a The snare was inserted into the bile duct over the guide- wire.b A 5-Fr cytology brush outer sheath was inserted into the bile duct while leaving the guidewire in the bile duct.c Then, the complementary metal oxide semiconductor (CMOS) camera was advanced into the outer sheath and polypectomy was performed under direct visualization.E496