Flat condyloma acuminata. Acetowhitening of the epithelium after acetic acid test, the full extent and delineation of the skin lesion are better appreciated.

• 扁平型尖锐湿疣醋酸白试验，即5%25的醋酸液湿敷3-4分钟后，皮损变白，轮廓清晰。