Fig. 7

A 45-year-old female patient with Peutz-Jeghers syndrome, anaemia and rectal blood loss. MR enterography (a) and (b) axial fat-saturated true-FISP images demonstrate intussusception with bowel-in-bowel appearance (white arrow) and a polyp as a lead point (open arrow) at a lower level of the same sequence. The cross-sectional diameter of the intussusception at the level of the lead point (polyp) is greater than a normal bowel loop, and this is different from an idiopathic intussusception (see Fig. 6a)