case_images: PMC5395791_01
case_images: A mass at the ascending colon demonstrated on CT scan of abdomen and pelvis. The arrow showed a circumferential thickening of a segment of ascending colon due to colonic mass
case_images: 40164_2017_69_Fig1_HTML.jpg
case_images: PMC5395791_01_40164_2017_69_Fig1_HTML.jpg
case_images: Fig1
case_images: He underwent CT scan of abdomen and pelvis and colonoscopy, and was found to have a 3-cm mass in the proximal ascending colon (Fig. 1).
case_images: Microscopic finding of the colon tumor. Biopsy by colonoscopy showed poorly differentiated squamous cell carcinoma with dense cytoplasm, irregular nuclear contours, moderate pleomorphism and prominent nucleoli (hematoxylin and eosin stain, x40). Additional immunohistochemical study and comparison to prior tumor histology indicated metastatic rather than a primary colorectal carcinoma
case_images: 40164_2017_69_Fig2_HTML.jpg
case_images: PMC5395791_01_40164_2017_69_Fig2_HTML.jpg
case_images: Fig2
case_images: The biopsy showed metastatic SCC (Fig. 2).