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Chapter: 6 / Q: 58
The most common oncogene abnormality observed in association with colorectal cancer is which of the following?
Chapter: 6 / Q: 59
Which of the following types of colonic polyps is associated with the highest incidence of malignant degeneration?
Chapter: 6 / Q: 60
A 52-year-old man undergoes a right hemicolectomy for a carcinoma of the ascending colon. Pathological examination of the resected specimen reveals invasion of the tumor to the level of the muscularis propria. Three of 17 lymph nodes contain microscopic tumor. What is the correct Dukes
Chapter: 6 / Q: 61
An pedunculated polyp, discovered incidentally at colonoscopy, is removed by snare polypectomy from the ascending colon. Invasive cancer to the level of the submucosa is identified histologically within the polyp. The lesion is well-differentiated. No lymphatic or vascular invasion is noted
Chapter: 6 / Q: 62
Dietary risk factors thought to play a causative role in development of colorectal cancer include which of the following?
Chapter: 6 / Q: 63
Which of the following statements with regard to resection of rectal cancers is/are true?
Chapter: 6 / Q: 64
A 58-year-old male undergoes resection of a Dukes C2 colon cancer via right hemicolectomy. Three years postoperatively, rising CEA levels prompt evaluation including abdominal computed tomography
Chapter: 6 / Q: 65
An asymptomatic 52-year-old man is undergoing screening sigmoidoscopy. In the rectum, at 6 cm from the anal verge, a 2 cm yellow, submucosal nodule is noted. Deep endoscopic biopsies are consistent with carcinoid. Appropriate management includes which of the following?
Chapter: 6 / Q: 66
A 72-year-old woman complains of anal itching and burning. Physical examination reveals an erythematous, scaly lesion, 3 cm in circumference, within the anal canal. The intersphincteric groove can not be appreciated in the area of the lesion. The remainder of the physical examination is normal
Chapter: 6 / Q: 67
For the patient in the preceding question, biopsy revealed an invasive apocrine gland neoplasm. The deep margins included striated muscle infiltrated by neoplastic cells. Appropriate management includes which of the following?
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