21-45. 4 Koch M, Freundl AJ, Agaimy A et al. Atypical fibroxanthoma -histological diagnosis, immunohistochemical markers and concepts of therapy. Anticancer Res 2015; 35: 5717-5735.5 Ito A, Yamada N, Yoshida Y, Morino S, Yamamoto O. Myofibroblastic differentiation in atypical fibroxanthomas occurring on sunexposed skin and in a burn scar: an ultrastructural and immunohistochemical study.
FIGURE2. A, B, The tumor of the right index finger revealed numerous nests composed of atypical keratinocytes with invasion into the dermis and subcutaneous tissue (hematoxylin and eosin [H&E], •40 [a], •400 [b]). C, The surrounding epidermis of the tumor also showed atypical keratinocyte proliferation with hyperchromatic and clumped nuclei (HE, •200). D, HPV genotyping using the PCR-rSSO method revealing the presence of HPV-18 and HPV-45 in the lesions.
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