Mucinous adenocarcinoma of colon in 22-year-old female.Coronal contrast-enhanced CT image reveals segmental, low-attenuated wall thickening (arrow) at descending colon, causing upstream colonic obstruction (asterisk). Several punctate calcifications (arrowheads) are seen in low-attenuated, thickened colon wall. Patient underwent left hemicolectomy and was diagnosed with mucinous adenocarcinoma.