Prenatal ultrasound diagnosis of anorectal atresia: multicenter analysis

A retrospective analysis of 36 cases of prenatal diagnosed of anorectal atresia at 11–14 weeks of gestation is presented. The median gestational age at examination was 12+4 (range, 11+2–16+1) weeks. Pelvic translucency (abnormal ellipsoid anechogenic translucency in the fetal pelvis) was identified 39 cases, including 94,4 % (34/36) cases with anorectal atresia. There was 3 false-positive case, in which the anus was anatomically and functionally normal. The pelvic translucency seems to be a highly sensitive and specific sonographic marker for anorectal atresia at 11–14 weeks of gestation.