Fetal Entrapment in the Myometrium Caused by Ectopic Implantation Post Myomectomy

Fetal entrapment in myometrial dehiscence after myomectomy has been rarely reported. A 38-year-old woman, gravida 4, parity 2, with suspected amniotic or adhesion band was referred to our hospital at 234/7 weeks. She had undergone open myomectomy and cesarean delivery twice. Ultrasonography revealed two separate compartments divided by a septum-like structure with a small orifice. Magnetic resonance imaging (MRI) finding suggested an ectopic implantation on the endometric and myometrial dehiscence. At 25 weeks, the thoracic cage and umbilical cord escaped through the orifice. Emergent cesarean delivery and subtotal hysterectomy were performed for the placental increta at the myometrial dehiscent site. In fetal entrapment in myometrial dehiscence, MRI is valuable for the assessment of the fetus and spatial arrangement in the uterine cavity.