Fig. 2
A Recurrent DFSP with red nodule in the abdominal wall of a 36-year-old man. B Transverse ultrasonogram revealing a well-defined, hypoechoic, heterogeneous, and subcutaneous lesion. C Color Doppler ultrasonogram revealing rich vascularization with vascular densities reaching 4.5/cm2. D Contrast-enhanced ultrasound revealed the trend that contrast agent enters the lesion from the periphery to the center. E Contrast-enhanced ultrasound revealed heterogeneous hyper-enhancement at peak (the 32th second), with filling defect in the center. F Time intensity curve revealed peak of 34.9 and sharpness of 0.037