case_images: PMC11832538_01
case_images: Transvaginal ultrasound examinations. (A) No gestational sac was visible within the uterine cavity. (B) A gestational sac was identified in the uterorectal pouch, containing a yolk sac approximately 0.4 cm in diameter, with detectable blood flow. (C) An embryo bud, measuring approximately 0.4 cm, was observed within the gestational sac in the uterorectal pouch. (D) A mixed mass, measuring 5.7 x 1.7 cm, was detected in the pelvic region, with no evidence of blood flow.
case_images: fmed-11-1515249-g001.jpg
case_images: PMC11832538_01_fmed-11-1515249-g001.jpg
case_images: fig1
case_images: Transvaginal ultrasonography revealed a normal uterus (Figure 1A) and identified a mixed mass in the rectouterine pouch, measuring approximately 2.2 x 1.9 cm. Notably, a fetal pole and cardiac activity were observed within the mass, with the fetal pole measuring 0.4 cm in length, and a yolk sac was also detected with a diameter of approximately 0.4 cm (Figures 1B,C). Additionally, a 5.7 x 1.7 cm mixed echogenic mass was noted on the right side of the pelvic floor, characterized by clear boundaries, an irregular shape, uneven internal echoes, and no significant blood flow signal on color Doppler flow imaging (CDFI) (Figure 1D).