Plastic Surgery>>>>>Reconstructive head and neck surgery
Question 9#

The progression rate of oral leukoplakia to invasive cancer within at least 12 years is: 

A. 30%
B. 40%
C. 50%
D. 60-100%
E. None of the above

Correct Answer is E

Comment:

None of the above. The progression rate to cancer is variably quoted ranging from 2.7% to 17.5%.  

References:
1. Gnepp DR. Diagnostic surgical pathology of the head and neck, 2nd ed. SaundersElsevier, 2009: 9.