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.
Epidemiology
The estimated incidence is increasing (presumably related to increased practice of caesarean sections) and is thought to be around 1:50,000 pregnancies.
Pathology
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
Ultrasound
As with the less severe placenta accreta, there can be the focal obliteration of the hypoechoic retroplacental zone detected on ultrasound 4.
Related articles
Placental pathology
-
placenta
- placental anatomy
- placental developmental abnormalities
- placenta previa
- spectrum of abnormal placental villous adherence
- abnormalities of cord insertion
- abruptio placentae
- placental pathology
- vascular pathologies of placenta
- placental infections
- placental masses
- molar pregnancy
- twin placenta
- miscellaenous
Ultrasound - obstetric
- ultrasound (introduction)
- obstetric ultrasound
- first trimester and early pregnancy
- ectopic pregnancy
- multiple gestations
- subchorionic hematoma
- failed early pregnancy
-
second trimester
- fetal biometry
- fetal morphology assessment
- fetal echocardiography views
- nonvisualisation of the fetal stomach
-
soft markers
- nuchal fold thickness
- ventriculomegaly
- absent nasal bone
- choroid plexus cysts
- enlarged cisterna magna
- shortened fetal long bones
- echogenic intracardiac focus (EIF)
- echogenic fetal bowel
- aberrant right sublavian artery
- fetal pyelectasis / fetal renal pelvic dilatation
- single umbilical artery
- sandal gap toes
- amnioreduction
- Doppler ultrasound
- nuchal translucency
- chorionic villus sampling (CVS) and amniocentesis
- placenta
- other
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