PMC7481497_01
The tumor in the ascending colon at colonoscopy.
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Upper gastrointestinal endoscopy showed no abnormalities, but colonoscopy revealed a tumor in the ascending colon (Fig. 1), and the endoscopic biopsy was strongly suggestive of metastatic RCC.
Computed tomography shows wall thickening in the ascending colon.
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A CT scan showed a thickened wall in the ascending colon (Fig. 2).
Macroscopic inspection of the mass lesion with ulceration in the resected ascending colon.
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The tumor in the resected colon was raised and ulcerated in the center (Fig. 3).
A: The tumor was composed of clear cell renal cell carcinoma (hematoxylin and eosin [H&E]; x100) B: Venous invasion was observed in the resected mesocolon (H&E; x40).
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The histopathological examination confirmed the ascending colon tumor was a metastatic clear cell RCC (Fig. 4A).