Fig. 3
A, DFSP with reddish plague in the right waist of a 36-year-old woman. B Transverse ultrasonogram revealing a well-defined, mixed with a hyperechoic ring, heterogeneous, and subcutaneous lesion. C Color Doppler ultrasonogram revealing intralesional and peripheral vascularity and rich vascularization with vascular densities reaching 3.5/cm2. D Contrast-enhanced ultrasound revealed the trend that contrast agent enters the lesion from the bottom to the center. E Contrast-enhanced ultrasound revealed heterogeneous hyper-enhancement at peak (the 20th second), with the maximum diameter and depth of 2.4 cm and 1.6 cm respectively. F Time intensity curve revealed peak of 23.4. G The hypoechoic area correlated with a storiform growth pattern on histology (hematoxylin-eosin × 40)