A Case of Sirenomelia Diagnosed at 12 Gestational Weeks.

Song, Gye Young; Han, Sung Sik; Kim, Young Han; Gwon, Hye Gyung; Lee, Chang Hee; Jo, Jae Sung; Park, Yong Won

Obstet Gynecol Sci > Volume 44(1); 2001 > Article

Case Report

Korean Journal of Obstetrics & Gynecology 2001;44(1):198-201.
Published online: January 1, 2001

A Case of Sirenomelia Diagnosed at 12 Gestational Weeks.

Gye Young Song, Sung Sik Han, Young Han Kim, Hye Gyung Gwon, Chang Hee Lee, Jae Sung Jo, Yong Won Park

Department of Obstetrics and Gynecology, College of Medicine, Yonsei University, Seoul, Korea.

Abstract

Sirenomelia, characterised by a complete or incomplete fusion of the lower extremities, is a severe form of caudal defect affecting 1.5-4.2 in 100,000 births. Most cases of sirenomelia die within 5days after birth and are associated with abnormalities such as renal agenesis, urinary tract agenesis, single umbilical artery, etc. Third trimester ultrasonographic diagnosis is usually impaired by severe oligohydramnios whereas the amount of amniotic fluid may be sufficient to allow diagnosis in the early second trimester. We report a case of sirenomelius at 12 weeks of gestation using prenatal transvaginal ultrasonography.

Keywords: Sirenomelia; Oligohydramnios; Transvaginal ultrasonography