Prenatal diagnosis, clinical significance and management of fetal intracranial teratoma: a case report and literature review.

We report the prenatal ultrasonographic diagnosis of a massive intracranial teratoma in a 32-week breech intrauterine pregnancy associated with polyhydramnios and enlarged fetal head circumference. Ultrasound appearance, clinical significance, and how the prenatal diagnosis affects management and prognosis for both mother and fetus are discussed.