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 invades the myometrium. 


The estimated incidence is increasing (presumably related to increased practice of caesarean sections) and is thought to be around 1:50,000 pregnancies.


In placenta increta, chorionic villi invade well into the myometrium but not through the entire wall. Risk factors are similar to other forms of abnormal placental implantation.

Radiographic features


As with the less severe placenta accreta, there can be the focal obliteration of the hypoechoic retroplacental zone detected on ultrasound 4.

Ultrasound - obstetric
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Article information

rID: 13497
System: Obstetrics
Section: Pathology
Synonyms or Alternate Spellings:

Cases and figures

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    Placenta increta
    Figure 1: placenta increta
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