PMC9902694_01
Abdominal computed tomography images. (A) A well-enhancing soft-tissue mass (blue arrow), measuring approximately 4 cm, at the ascending colon. (B) Increased colonic wall thickness (red arrow) of the ascending colon and cecum.
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Abdominal computed tomography (CT) performed at a local hospital revealed a soft-tissue mass, measuring approximately 4 cm, and increased colonic wall thickness in the ascending colon and cecum (Fig. 1).
Colonoscopic findings. (A, B) An approximately 4-5 cm polypoid mass with a short stalk, thickly coated exudates, mucosal desquamation, and deep ulcers originating in the cecum.
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Colonoscopy revealed an approximately 4-5 cm polypoid mass with a short stalk, thickly coated exudates, mucosal desquamation, and deep ulcers in the ascending colon and cecum (Fig. 2).
Gross and pathologic findings. (A) A well-defined pedunculated mass at the cecum. (B) Ulceration (red arrow) with marked pleomorphic cell proliferation limited to the mucosa and submucosa (hematoxylin and eosin stain, x6). (C) Marked pleomorphic cell (red arrows) and spindle cell proliferation (yellow arrows) with severe neutrophil infiltration (blue dotted arrows) (hematoxylin and eosin stain, x200).
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Grossly, the resected specimen revealed a 4.5x3.8x2.2 cm polypoid mass with a short stalk originating in the cecum (Fig. 3A). Microscopic examination revealed marked pleomorphic cell proliferation limited only to the mucosa and submucosa, with ulceration evident at low magnification (Fig. 3B) and marked pleomorphic and spindle cell proliferation with severe neutrophil infiltration at higher magnification (Fig. 3C).