Atypical fibroxanthoma and pleomorphic dermal sarcoma – gene expression analysis compared with undifferentiated cutaneous squamous cell carcinoma. JDDG: Journal der Deutschen Dermatologischen Gesellschaft, (21)5:482–491, Wiley, April 2023. [PUMA: Atypical carcinoma cell cutaneous dermal fibroxanthoma pleomorphic sarcoma undifferentiated] URL