case_images: PMC5831991_01
case_images: Computed tomographic image showing moderately enhancing cystic lesion at hepatic flexure (arrow).
case_images: CRIGM2018-6143570.001.jpg
case_images: PMC5831991_01_CRIGM2018-6143570.001.jpg
case_images: fig1
case_images: Computed tomography (CT) scan of the abdomen with contrast revealed a 20 mm moderately enhancing cystic lesion at the hepatic flexure (Figure 1).
case_images: Intraluminal mass at hepatic flexure (a) and transparent appearance (b).
case_images: CRIGM2018-6143570.002.jpg
case_images: PMC5831991_01_CRIGM2018-6143570.002.jpg
case_images: fig2
case_images: On repeat colonoscopy, a tattooed subepithelial intraluminal transparent mass lesion was seen at the hepatic flexure (Figure 2).
case_images: 12 MHz EUS images showing subepithelial anechoic lesion lined by mucosa.
case_images: CRIGM2018-6143570.003.jpg
case_images: PMC5831991_01_CRIGM2018-6143570.003.jpg
case_images: fig3
case_images: A 12 MHz mini-EUS probe was passed through the biopsy channel of the colonoscope which revealed a 14 mm subepithelial anechoic cystic lesion lined by mucosa consistent with colonic duplication cyst (Figure 3).
case_images: Fluid drainage after unroofing the cyst cavity (a) and flattening of lesion after drainage (b).
case_images: CRIGM2018-6143570.004.jpg
case_images: PMC5831991_01_CRIGM2018-6143570.004.jpg
case_images: fig4
case_images: Hot snare was used to unroof and expose the cyst cavity (Figure 4(a)). Clear fluid was seen gushing from the mass with flattening of the lesion after drainage (Figure 4(b)).
case_images: Normal colonic mucosa with thermal cautery artifact.
case_images: CRIGM2018-6143570.005.jpg
case_images: PMC5831991_01_CRIGM2018-6143570.005.jpg
case_images: fig5
case_images: Pathologic evaluation showed normal colonic mucosa without any dysplastic changes (Figure 5).