Fig. 2From: Congenital atrophic dermatofibrosarcoma protuberans detected by COL1A1-PDGFB rearrangementUltrasonography revealed both hyper- and hypo- echoic tumors from the superficial dermis to the subcutaneous tissue (a). Both lesions were ill-defined and hypo-echoic tumors were suspected to be malignant because of their abnormal hypervascularity (b)Back to article page