Fig. 1From: Struma ovarii and peritoneal strumosis during pregnancyGreyscale and Doppler ultrasound images of the pelvic masses in a 39-year-old pregnant woman. a shows the period of the first trimester, and the cyst content was anechoic with thick septa. b, c and d were from the third trimester. b shows a solid hypoechoic area with rich blood flow signals in the Douglas pouch (white arrow). There were two papillary projections approximately 22 mm (arrows: c) with smooth contours and no vascularization on power Doppler (d)Back to article page