Figure Legends
Figure 1. (A) KA before therapy. (B) The lesion showing complete remission after therapy. (C) Two nodules arose from the original lesion.
Figure 2. (A) Histological observation after haematoxylin-eosin staining of the lesion before radiotherapy (original magnification, Ⅹ20). (B) Histologic observation after haematoxylin-eosin staining of a new keratoacanthoma after radiotherapy (original magnification, Ⅹ20).