olvulus is generally a condition that occurs in the pediatric age group, commonly associated with intestinal malrotation. The intrauterine occurrence of this condition is a rare occasion, and only a few cases have been reported. Precise diagnosis is hampered by the extensive differential diagnoses of fetal intra-abdominal masses observed during sonographic examination. However, detection of the "whirlpool sign" facilitates sonographic diagnosis of this condition. We report a case of intestinal volvulus that occurred in utero diagnosed definitively with 2-dimensional and 3-dimensional (3D) Doppler sonography. To our knowledge, there is no previous report of such a case that was diagnosed by 3D Doppler sonography in the English literature.
Case ReportA 50-year-old nulliparous woman was admitted to our maternity ward at 28 gestational weeks after decreased fetal movements. Her pregnancy was achieved with ovum donation and in vitro fertilization. She had 1 previous pregnancy that ended with a spontaneous miscarriage. Her medical history was unremarkable. Her routine follow-up results were normal during this pregnancy, including a fetal anatomic scan that was performed 3 weeks earlier.Initial evaluation revealed a nonstress test result of a reassuring fetal heart rate pattern and no uterine contractions. On fetal sonography, a singleton fetus was observed with a normal amniotic fluid index and no ascites or intraperitoneal echogenicity. However, a dilated stomach was seen, together with a fixed, dilated, Cshaped bowel loop in the upper part of the abdominal cavity (Figure 1). The affected bowel had a thick echogenic