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Korean Journal of Obstetrics & Gynecology 2005;48(3):766-771.
Published online March 1, 2005.
A case of congenital retroperitoneal immature teratoma: Prenatally diagnosed as Neuroblastoma.
Chong Mi Yi, Mi Suk Kim, Youn Seok Choi, Kyug Jae Jung, Young Hwan Lee, Jung Sik Kim
1Department of Obstetrics and Gynecology, School of Medicine, Catholic University of Daegu, Korea. yi7921@hanmail.net
2Department of Diagnostic Radiology, School of Medicine, Catholic University of Daegu, Korea.
3Kim Jung Sik Radiolodical Clinic, Korea.
Through a routine antenatal ultrasound examination of 37-year-old woman at 38 weeks' gestation, a 6 cm-diameter mixed solid and cystic mass was found in the left suprarenal area of her fetus. The following antenatal magnetic resonance image showed a larger cystic mass with a central solid component. The surgical exploration of the mass was performed in 50 days after delivery and by the pathologic examination a grade III immature teratoma was found. The retroperitoneal immature teratomas are extremely rare in childhood. To our Knowledge this is the first reported case about congenital retroperitoneal immature teratoma. The immature teratoma should be included in the differential diagnosis of fetal suprarenal mass and the serum alpha-fetoprotein level should be included in the initial laboratory examination at birth.
Key Words: Immature teratoma, Prenatal diagnosis, Ultrasound, Retroperitoneal, Neuroblastoma

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