Three hive-like wheels of the right temple on a man fifteen minutes following cryosurgery (liquid nitrogen) for precancers (actinic keratosis).
 

 Blister forming underneath precancer following treatment with liquid nitrogen. The precancer cells (actinic keratosis) are the bad cells and are being lifted away by blister fluid from the new cells which will regenerate a new surface from the hair pores below.

 

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