Figure 6a. In utero drainage of a large cystic sacrococcygeal teratoma. (a) US image of a cystic sacrococcygeal teratoma shows a needle being inserted into the sac (straight arrow) under US guidance. Curved arrow = tip of the spine. The contents were aspirated, which facilitated vaginal delivery. (b) Photograph of the infant obtained immediately after delivery shows the collapsed sacrococcygeal teratoma (arrow).