Abstract
This case exemplifies the difficulty in differentiating cystic sacrococcygeal teratoma and terminal myelocystocele. Fetal sonography presentation and perinatal risks of sacrococcygeal teratoma and terminal myelocystocele are compared, and we emphasize the importance of obtaining fetal MR imaging to establish an accurate diagnosis.
Highlights
The terminal spine presents unique imaging challenges, in the case of large cystic masses
The follow-up fetal sonography at 36 weeks showed the mass had grown (10 ϫ 10 ϫ 6 cm) and the Amniotic fluid index (AFI) had increased to 24 cm
MR imaging at 30 weeks revealed pelvic extension previously undetected on sonography (Fig 2C, -D) and confirmed the diagnosis of type 2 sacrococcygeal teratoma (SCT)
Summary
Terminal Myelocystocele and Sacrococcygeal Teratoma: A Comparison of Fetal Ultrasound Presentation and Perinatal Risk. SUMMARY: This case exemplifies the difficulty in differentiating cystic sacrococcygeal teratoma and terminal myelocystocele. Fetal sonography presentation and perinatal risks of sacrococcygeal teratoma and terminal myelocystocele are compared, and we emphasize the importance of obtaining fetal MR imaging to establish an accurate diagnosis. The terminal spine presents unique imaging challenges, in the case of large cystic masses. An isolated terminal myelocystocele mimicked a cystic sacrococcygeal teratoma (SCT) on prenatal sonography. The second case of type 2 (SCT) is presented for comparison. We discuss the presentation and perinatal risks of these 2 cystic sacrococcygeal masses and illustrate surgical correction of a cystic terminal myelocystocele
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