Neuroendocrine and squamous colonic composite carcinoma: Case report with molecular analysis

Figure 1 Hematoxylin and eosin-stained sections of tumor. A: The tumor (asterisk) is submucosal with extension through inner and outer muscularis propria (arrows), 100 ×; B: Intimate mixing of squamous (asterisk) and neuroendocrine (arrow) components, 400 ×; C: Lymph node metastasis of both components (squamous, asterisk; neuroendocrine, arrow), 100 ×; D: Liver fine needle aspirate showing predominantly neuroendocrine cells (arrow) with background bland hepatocytes, 200 ×.