Placental shelf—a common, typically transient and benign finding on early second‐trimester sonography

Abstract

ABSTRACT

Abnormal ultrasound appearance of the amniotic membranes – diagnostic and significance: a pictorial essay

“…In this situation, the arterial flow confirmed the presence of maternal tissue in the sheet [17]. There have been numerous reports on the antenatal diagnosis of circumvallate placenta using two-dimensional (2D) and three-dimensional ultrasound [16,18,19].…”

Antenatal three-dimensional sonographic features of placental shelf

“…However, visualization of the continuity and extension of the placental shelf was not easily accomplished with conventional 2D ultrasound. There has been only one reported case of a placental shelf diagnosed by prenatal 3D ultrasound [2]. As shown in the present and previous reports, more detailed information on the placental shelf was obtained by means of 3D ultrasound.…”

“…There have been some reports of antenatal detection of a placental shelf using conventional 2D ultrasound [1,2]. However, visualization of the continuity and extension of the placental shelf was not easily accomplished with conventional 2D ultrasound.…”

“…Shen et al [2] detected 17 placental shelves (11.2%) in 152 consecutive anomaly scans performed between 13 and 16 weeks of gestation. In their study group, early secondtrimester placental shelves rarely persisted to mid-gestation, and never to the third trimester.…”

HDlive for Assessment of Placenta and Umbilical Cord

“…26 There have been only two reports of the antenatal detection of a placental shelf using conventional 3D ultrasound. 26,27 HDlive provides new, realistic sensations for the diagnosis of a placental shelf, and a near-fetoscopic image of it can be obtained by employing HDlive (Figs 14A and B).…”