Figure 1. 54-year-old woman with primary sclerosing lipogranuloma of the rectum. (a,b) Transverse contrast-enhanced CT scans with a craniocaudal sequence show a well-margined, homogeneous mass (arrows) with isoattenuation to the gluteus muscle in the right lateral wall of the rectum. An endorectal tube is noted in the rectal lumen. (a) There is a small portion of fat (thin arrow) in the mass. (b) The intact, inner, enhancing layer of the rectal wall (open arrow) is noted and suggests a submucosal mass.