case_images: PMC5327847_01
case_images: (A) A small ulcerative ulceration covered by erythematous crust; (B) first application of 70% trichloroacetic acid, frosting effect; (C) second application of 70% trichloroacetic acid; (D) no sign of dermatological lesion or tumor.
case_images: ccid-10-067Fig1.jpg
case_images: PMC5327847_01_ccid-10-067Fig1.jpg
case_images: f1-ccid-10-067
case_images: The patient described a small crusted ulceration after each application, slight pain, and pruritus. The patient was seen 4 weeks after the last application of topical treatment with no signs of dermatological lesion on the preauricular area (Figure 1).