Introduction to Human Disease: Pathophysiology for Health Professionals 6th Edition by Agnes Loeffler,Michael Hart

Exercise 3

A 67-year-old man who has used chewing tobacco for 40 years is found to have a small protruding growth in his mouth. The pathologist reading the subsequent biopsy notes dysplastic cells that are confined to the epithelial (mucosal) layer. This is an example of
A) carcinoma in situ.
B) sarcoma.
C) hyperplasia.
D) papilloma.
E) metaplasia.