Partially ulcerated colonic mucosa infiltrated by carcinoma arranged predominantly in solid sheets with focal glandular differentiation is identified. The tumor is composed of medium to large pleomorphic cells exhibiting marked anaplasia, irregular hyperchromatic nuclei, and moderate cytoplasm. Frequent mitotic figures, including atypical forms, and apoptotic bodies are identified. Areas of necrosis are noted.
Colonic mass.
Soft tissue fragments collectively measured 1 cm, totally embedded.
Colonic mass, endoscopic biopsy: