Figure 8b. Tailgut cyst in a 30-year-old woman. (a) Photomicrograph (original magnification, x40; H-E stain) shows a cyst wall lined with stratified squamous epithelium. (b) Contrast-enhanced CT scan shows well-defined, thin-walled multicystic masses in the presacral space (thin arrows). The rectum is compressed and anteriorly displaced (thick arrow).