PMC3566947_01
Computed tomography. (A) Note the thickened wall of the ascending colon (short arrow) and enlarged lymph nodes in the mesentery (long arrow). (B) The hepatic lesion manifested ring-shaped enhancement (arrow).
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F1
The regional enlarged lymph nodes and metastases in the liver were noted (Figure 1).
Endoscopic biopsy (A) Colonoscopy revealed a circular yellow tumor in the ascending colon.(B) An endoscopic biopsy revealed atypical epithelium (hematoxylin and eosin x100).
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F2
A colonoscopy revealed a yellow tumor in the colon (Figure 2) and endoscopic biopsy findings suggested a poorly differentiated adenocarcinoma.
Pathologic findings.(A) Pathologic findings of the resected specimen revealed polynuclear giant cells. (B) Immunohistochemical staining was positive for human chorionic growth hormone.
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F3
Immunohistochemical staining was positive for HCG and negative for cytokeratin 7, cytokeratin 20, villin, caudal type homeobox 2, alpha-fetoprotein and CD30 (Figure 3).