placental cyst

Placental cyst refers to a simple cystic lesion that develops in relation to the placenta.

Epidemiology

Their estimated prevalence is at 2-20% of all pregnancies.

Pathology

Location

They can be categorized by location:

• within the placental tissue (placental septal cysts) 
• under the fetal plate (subchorionic / surface cyst)

Radiographic features

Ultrasound

May be seen as an anechoic rounded/ovoid cyst in association with placental tissue. Color Doppler interrogation shows no evidence of any vascular flow.

Complications

• large cysts (greater than 4.5 cm) or multiple cysts may be a causative factor in intrauterine growth restriction especially when in close proximity to the umbilical cord insertion site

Differential diagnosis

• large umbilical cord cyst near the site of cord insertion
• subamniotic hemorrhage

See also

• placental venous lakes

Siehe auch:

• Intrauterine Wachstumsretardierung
• placental venous lakes
• placental septal cysts

und weiter:

• placental septal cyst