Large sacrococcygeal teratoma hindering vaginal delivery attempted at home.

Sacrococcygeal teratoma in fetus is rare. If it remains antenatally undiagnosed, it may cause sudden arrest of an otherwise uncomplicated vaginal delivery because of the tumor mass. This poses a challenge to obstetricians. In this era of widespread antenatal care, this type of complication is very rare; however, in such cases, if met unexpectedly, an urgent laparotomy followed by a reduction of the tumor mass might help in completion of the delayed delivery.