Prenatal Diagnosis of Congenital Curly Toe: Two- and Three-dimensional Sonographic Features

Case RepoRt IntroductIonCongenital curly toe typically affects the fourth or fifth toe, with a reported total prevalence of 32.6 per 1,000 births (3.26%). 1 The rate of prenatally diagnosing congenital curly toe is only 42.1%. 1 There have been only three reports on prenatal diagnosis of congenital curly toe using twodimensional (2D) sonography. 1-3However, to the best of our knowledge, there has been no reported study on threedimensional (3D) ultrasound diagnosis of congenital curly toe.We present 2D/3D ultrasound features of a congenital curly toe in a fetus. case descrIptIonA 40 -year-old pregnant Japanese woman, G2 P0, underwent routine second-trimester fetal screening at 19 weeks and 6 days of gestation, and oligodactyly of the left foot was suspected based on 2D sonography because only four left toes were detected (Fig. 1).However, 3D ultrasound revealed the fourth toe beneath the third toe of the left foot (Fig. 2).At 26 weeks and 4 days, 2D sonography depicted a medially deviated fourth toe beneath the third toe of the 1,