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Figure 2: Patient 2. (a) Lesions in commissura labiorum posterior. (b) Multiple mitoses and marked pleomorphism in keratinocytes in the epidermis. (H and E,×100). (c) After PDT therapy

Figure 2: Patient 2. (a) Lesions in commissura labiorum posterior. (b) Multiple mitoses and marked pleomorphism in keratinocytes in the epidermis. (H and E,×100). (c) After PDT therapy