Placenta increta

Placenta increta is an intermediate level in the spectrum of abnormal placental villous implantation and accounts for ~20% of such cases. The placental villi extend beyond the confines of the endometrium and invade the myometrium.

Epidemiology

The estimated incidence is increasing (likely related to the increased practice of cesarean sections), probably ~1 in 50,000 pregnancies.

Risk factors 

• prior cesarean section
• placenta previa
• advanced maternal age
• uterine anomalies
• intrauterine adhesion bands
• previous surgery

Pathology

In placenta increta, chorionic villi invade well into the myometrium but not through the entire wall.

Radiographic features

Ultrasound

As with the less severe placenta accreta, there can be focal obliteration of the retroplacental hypoechoic zone .

Siehe auch:

• Placenta accreta
• Entwicklungsanomalien der Plazenta
• Placenta percreta
• abnormal placental villous implantation

und weiter:

• placenta
• variation in placental morphology
• Uterus incarceratus