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 classification (Aster-Coller modification) and associated 5-year survival for this lesion?
A. Dukes C2, 45% 5-year survival
B. Dukes B1, 75% 5-year survival
C. Dukes C1, 45% 5-year survival
D. Dukes B3, 65% 5-year survival
Answer:C
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 classification (Aster-Coller modification) and associated 5-year survival for this lesion?
A. Dukes C2, 45% 5-year survival B. Dukes B1, 75% 5-year survival C. Dukes C1, 45% 5-year survival D. Dukes B3, 65% 5-year survival