Fig. 1

B-ultrasound image. Solid mixed pelvic echo area of 5.0 cm × 3.8 cm × 4.7 cm, with a clear boundary and regular morphology (A). CDFI: Rich blood flow signals can be detected within the arterial spectrum, with the arterial resistive index (RI) at 0.64. A free, nocturnal dark area was found in the pelvic cavity at a depth of about 1.7 cm (B)