title: Early sonographic findings suggestive of the human fetal tail.
abstract: The prenatal diagnosis of a human tail was suggested in six fetuses with ultrasound findings of an echogenic protrusion in the lumbo-sacral region. All fetuses were at 14-16 weeks' gestation. The ultrasound findings disappeared in all cases at 22-23 weeks. Dermal abnormalities such as pilonidal sinus, deep dimples, and scarred tissue were found in all six newborns. It is possible that the late regression of the embryonic human tail was the cause of these dermal findings.
authors: Department of Obstetrics and Gynecology, Rambam Medical Center, Technion-Faculty of Medicine, Haifa, Israel.
authors: E Z
authors: EZ
authors: Zimmer
authors: M
authors: M
authors: Bronshtein
mesh_terms: D000818:Animals; D004200:Diseases in Twins; D005260:Female; D005315:Fetal Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D007231:Infant, Newborn; D008161:Lumbosacral Region; D018191:Lymphangioma, Cystic / Q000000981:diagnostic imaging; D008297:Male; D010864:Pilonidal Sinus / Q000000981:diagnostic imaging*; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second; D012868:Skin Abnormalities; D013623:Tail / Q000002:abnormalities* / Q000000981:diagnostic imaging; D016216:Ultrasonography, Prenatal