Abstract:

Teratoma is a congenital embryogenic tumor, and its occurrence in the placenta is rare. A case of mature teratoma of the placenta is reported here. The patient was a 23-year-old woman. Prenatal ultrasound examination revealed a well-defined, encapsulated mixed-echo mass connected to the fetal surface of the placenta through a band-like structure. Multiple strong-echo spots with posterior acoustic shadows were detected inside, and placental teratoma was considered. Subsequently, regular ultrasound re-examinations were conducted, and no obvious changes were found in the size and echo of the mixed-echo mass. At 40⁺⁵ weeks of gestation, a live female infant was delivered vaginally. The placenta was delivered smoothly. A yellow tissue was observed at the edge of the placenta with the naked eye, and it was confirmed as a mature teratoma of the placenta by postpartum pathology. Through this case report, the characteristics of placental teratoma are summarized to improve the understanding of this disease, with the hope of providing a reference for clinical diagnosis and treatment.

Key words: Teratoma, Ultrasonography, Diagnosis, Diagnosis, differential, Prognosis