Furthermore, the teratoma must be differentiated according to its location, between the coccyx and the anus, from others that are located behind the sacrum and even in the intrapelvic region. The differential diagnosis must be made with the myelomeningocele - entity that more frequently leads to confusion with other diseases such as lipomas, hemangiomas, pilonidal cyst and epidermoid cyst. With this approach it is possible to prevent late complications such as coagulopathy, necrosis by compression, infections or intratumoral hemorrhage. The best way to treat this malignancy, is through complete resection and a histopathological study of it. These tumors may get enormous dimensions and contain large blood vessels that provoke blood depriving to the developing fetus.

They are formed of various types of tissue derived from at least two, or the three embryonic layers. Unlike in adults, fetal teratomas mostly develop at sacrococcygeal level. Sacrococcygeal teratoma is a neoplasia which despite its low frequency, is one of the most common ones in neonates. The postoperative course was uneventful and there were no further complications. Pathologic examination confirmed the diagnosis of sacrococcygeal teratoma. Images were obtained, and tumor resection was performed without complications.

The child was born at 38 weeks of gestational age with a large tumor in the sacrococcygeal area. On gestation week 32, the mass had grown, so the diagnosis of cystic hygroma was posed. The mass was detected on gestation week 24 in the sacrococcygeal area and was initially interpreted as a myelomeningocele. We present a male newborn child with a sacrococcygeal mass who was sent to clinic 46 of the Mexican Social Security Institute located in Gomez Palacio, Durango, Mexico for pediatric/neonatal surgical resolution.

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