case_images: PMC6584907_01
case_images: Computed tomography (CT) shows nodule formation of transverse colon with intense enhancement.
case_images: gr1.jpg
case_images: PMC6584907_01_gr1.jpg
case_images: fig0005
case_images: Contrast-enhanced computed tomography (CT) of the thorax and abdomen revealed an inhomogeneous hypodense nodule formation of 2.5 x 1.6 cm in diameter, with intense enhancement in the arterial phase localized to the middle-distal transverse colon (Fig. 1).
case_images: Photomicrograph of ulcerated polypoid lesion of transverse colon surrounded by a mucosa with increased consistency and velvety surface.
case_images: gr2.jpg
case_images: PMC6584907_01_gr2.jpg
case_images: fig0010
case_images: Histological examination of the colon revealed the presence of an ulcerated polypoid lesion of 2 x 2.8 cm in diameter surrounded by a mucosa with increased consistency and velvety surface extended for 3 cm (Fig. 2).
case_images: Photomicrograph of polypoid lesion of transverse colon shows a mesenchymal proliferation consisting of spindle cells organized in bundles.
case_images: gr3.jpg
case_images: PMC6584907_01_gr3.jpg
case_images: fig0015
case_images: Microscopic examination of the neoplasm showed a mesenchymal proliferation consisting of spindle cells, monomorphic and without significant atypia, organized in bundles and associated with diffuse infiltration of lymphocytes, plasma cells and eosinophils extending to the mucosa and infiltrating the submucosa (Fig. 3, Fig. 4).