title: Sonographic features of congenital infantile fibrosarcoma that appeared as a sacrococcygeal teratoma during pregnancy.
abstract: We experienced an extremely rare case of congenital infantile fibrosarcoma originating from the fetal sacrococcygeal region in pregnancy. At first, we suspected fetal sacrococcygeal teratoma; however, the following ultrasonography findings of the tumor complicated this diagnosis: (i) laterality; (ii) no cystic component; (iii) hypervascularity, with the feeding vessels not derived from the middle sacral artery; and (iv) a skin covering. The pathological findings indicated that the tumor was an infantile fibrosarcoma, not a teratoma. Thus, we believe that these sonographic features may aid the prenatal diagnosis of congenital infantile fibrosarcoma, which, in turn, may contribute to a better prognosis and may be useful for parental counseling.
authors.affiliation: Division of Perinatology, Fetal Diagnosis and Therapy, Maternal and Perinatal Care Center, Seirei Hamamatsu General Hospital, Hamamatsu, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Suzuki
authors.affiliation: Division of Perinatology, Fetal Diagnosis and Therapy, Maternal and Perinatal Care Center, Seirei Hamamatsu General Hospital, Hamamatsu, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Murakoshi
authors.affiliation: Division of Perinatology, Fetal Diagnosis and Therapy, Maternal and Perinatal Care Center, Seirei Hamamatsu General Hospital, Hamamatsu, Japan.
authors.forename: Kei
authors.initials: K
authors.lastname: Tanaka
authors.affiliation: Division of Perinatology, Fetal Diagnosis and Therapy, Maternal and Perinatal Care Center, Seirei Hamamatsu General Hospital, Hamamatsu, Japan.
authors.forename: Aiko
authors.initials: A
authors.lastname: Ogasawara
authors.affiliation: Division of Perinatology, Fetal Diagnosis and Therapy, Maternal and Perinatal Care Center, Seirei Hamamatsu General Hospital, Hamamatsu, Japan.
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Torii
mesh_terms: D005260:Female; D005315:Fetal Diseases / Q000000981:diagnostic imaging*; D005354:Fibrosarcoma / Q000151:congenital / Q000000981:diagnostic imaging*; D006801:Humans; D011247:Pregnancy; D012445:Sacrococcygeal Region; D013724:Teratoma / Q000151:congenital / Q000000981:diagnostic imaging*; D016216:Ultrasonography, Prenatal
keywords: congenital infantile fibrosarcoma; laterality; prenatal ultrasound; sacrococcygeal tumor; sonographic feature