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The Two Extremes of Sacrococcygeal Teratoma

extremes of sacrococcygeal teratomas. The first case represents a complex type I sacrococcygeal teratoma identified at 17 weeks’ gestation. The second case represents a cystic type IV sacrococcygeal teratoma identified at 31 weeks’ gestation. Sacrococcygeal teratomas are rare, with a reported incidence of 1 in 40,000, but are the most common tumors of fetuses and neonates. Sacrococcygeal teratomas affect females four times more than males. The mortality rate of prenatally diagnosed sacrococcygeal teratomas is approximately 50%. These two cases represent our clinic’s experience with two different types of sacrococcygeal teratomas and their outcomes.