Therefore, although some scholars prefer to refer to uterine tumors bearing COL1A1–PDGFB fusion as dermatofibrosarcoma in the uterus (considering the morphologic and IHC similarity), the nomenclature of uterine sarcoma with COL1A1–PDGFB fusion seems more appropriate. The gene discussed is COL1A1; the disease is dermatofibrosarcoma protuberans.