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. Author manuscript; available in PMC: 2012 May 1.
Published in final edited form as: Pain. 2011 Mar 8;152(5):1206–1209. doi: 10.1016/j.pain.2011.02.009

Figure 1. Oral precancer and oral cancer are clinically indistinguishable.

Figure 1

Precancerous lesions such as carcinoma in situ affecting the lateral tongue (A1), floor of mouth (A2), and buccal mucosa (A3) are not distinguishable from their respective squamous cell carcinoma counterparts (B1, B2, and B3) on physical examination alone. Black circles indicate approximate extent of oral lesion.