Review Question - QID 210858

A 55-year-old man presents to the physician with a complaint of malaise, fatigue, unintentional weight loss, and 2 episodes of gross red blood in his stool. He has a family history of colorectal cancer and was diagnosed with ulcerative colitis at the age of 17. His temperature is 98.7°F (37°C), blood pressure is 117/68 mmHg, pulse is 90/min, respirations are 14/min, and oxygen saturation is 98% on room air. He is referred to a gastroenterologist for a colonoscopy and is found to have a colonic polyp that is excised and collected as a tissue specimen. The pathologist identifies the specimen, shown in Figure A, as a neoplastic polyp with the greatest malignant potential. What type of neoplastic polyp does the patient have?