Intractable Nausea in a Patient with Metastatic Colorectal Cancer Following Insertion of a Colonic Stent

Colon segmental resection specimen opened with endoluminal stents in situ (a). The stented segment showed severe inflammatory disease with extensive ulceration and mural inflammation (b; original magnification 2×), mucosal acute and chronic inflammation with crypt distortion (c; original magnification 200×), and pseudopolyp formation (d; original magnification 2×). An invasive adenocarcinoma (T3 lesion), which was difficult to clearly identify on the mucosal aspect, was present at the distal portion of the stented segment (e; original magnification 2×; f, original magnification 50×; g, original magnification 250×).