Figure 2.

Same patient (45-year-old woman with Marfan syndrome) as in Fig. 1, five years after original CT. A: Axial IV contrast-enhanced image of the pelvis shows decrease in size of the presacral cyst with a new air-fluid level. B: Sagittal oblique MPR from IV contrast-enhanced image of the pelvis demonstrates secondary findings of fistula formation, including wall thickening and pericolonic inflammation of the sigmoid colon, absence of a fat plane between the sigmoid and the meningocele, and air within the meningocele.