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39 Anus and Perianal Area
1. Which of the following histologic patterns is most suggestive of the basaloid variant of anal carcinoma?
A. Extensive mucin production
B. Spindle cell tumor
C. Tumor nests with peripheral palisading
D. Villous architecture
E. Well-differentiated squamous epithelium with minimal atypia
2. Which of the following is true about primary adenocarcinomas of the anal canal?
A. All cases are due to extension from rectal tumors