case_images: PMC6914684_01
case_images: MRI: Several cysts were located in the retrorectal space, which had a clear border with the sacrum but adhered to the rectal tumor.
case_images: fonc-09-01389-g0001.jpg
case_images: PMC6914684_01_fonc-09-01389-g0001.jpg
case_images: F1
case_images: These cysts had a clear border with the sacrum but showed adhesion to the rectal cancer (Figure 1).
case_images: PET-CT revealed that the rectal tumor had high FDG accumulation; the cysts did not.
case_images: fonc-09-01389-g0002.jpg
case_images: PMC6914684_01_fonc-09-01389-g0002.jpg
case_images: F2
case_images: FDG accumulation in the retrorectal cysts was not enhanced (Figure 2).
case_images: Histology revealed that the rectal tumor is a mucinous adenocarcinoma.
case_images: fonc-09-01389-g0003.jpg
case_images: PMC6914684_01_fonc-09-01389-g0003.jpg
case_images: F3
case_images: The postoperative pathology indicated that a rectal mucinous adenocarcinoma had invaded retrorectal dermoid cysts (Figure 3).