“Passive-bending colonoscope” significantly improves cecal intubation in difficult cases

Figure 4 Sigmoid malrotation and loops, malrotation and mesocolon descendens, ascendens of paitents. A: 78 years old female has sigmoid malrotation and loops at splenic flexure; B: 70 years old female has sigmoid malrotation and mesocolon descendens; C: 70 years old male has mesocolon descendens and ascendens.