Placental grading
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Placental grading (Grannum classification) refers to aan ultrasound grading system of the placenta based on its maturity. This primarily affects the extent of calcifications. In some countries, the use of placental grading has fallen out of obstetric practice due to a weak correlation with adverse perinatal outcome 5.
The grading system is as follows:
-
grade 0: <18 weeks
- uniform echogenicity
- smooth chorionic plate
-
grade I: 18-29 weeks
- occasional parenchymal calcification/hyperechoic areas
- subtle indentations of chorionic plate
-
grade II:
>3030-38 weeks- occasional basal calcification/hyperechoic areas
- deeper indentations of the chorionic plate (does not reach up to the basal plate)
- seen as comma type densities at the chorionic plate
-
grade III:
>39≥ 39 weeks- significant basal plate calcification
- chorionic plate interrupted by indentations (frequently calcified) that reach up to the basal plate: cotyledons
- an early progression to a grade III placenta is concerning and is sometimes associated with placental insufficiency
- associated with smoking, chronic hypertension, SLE, diabetes
-<p><strong>Placental grading (Grannum classification)</strong> refers to a ultrasound grading system of the placenta based on its maturity. This primarily affects the extent of calcifications. In some countries the use of placental grading has fallen out of obstetric practice due to a weak correlation with adverse perinatal outcome <sup>5</sup>.</p><p>The grading system is as follows:</p><ul>- +<p><strong>Placental grading (Grannum classification)</strong> refers to an ultrasound grading system of the placenta based on its maturity. This primarily affects the extent of calcifications. In some countries, the use of placental grading has fallen out of obstetric practice due to a weak correlation with adverse perinatal outcome <sup>5</sup>.</p><p>The grading system is as follows:</p><ul>
-<li>smooth <a title="chorionic plate" href="/articles/chorionic-plate">chorionic plate</a>- +<li>smooth <a href="/articles/chorionic-plate">chorionic plate</a>
-<strong>grade II:</strong> >30 weeks<ul>- +<strong>grade II:</strong> 30-38 weeks<ul>
-<li>deeper indentations of chorionic plate (does not reach up to <a title="basal plate" href="/articles/basal-plate">basal plate</a>)<ul><li>seen as comma type densities at the chorionic plate</li></ul>- +<li>deeper indentations of the chorionic plate (does not reach up to <a href="/articles/basal-plate">the basal plate</a>)<ul><li>seen as comma type densities at the chorionic plate</li></ul>
-<strong>grade III:</strong> >39 weeks<ul>- +<strong>grade III:</strong> ≥ 39 weeks<ul>
-<li>chorionic plate interrupted by indentations (frequently calcified) that reach up to basal plate: cotyledons</li>- +<li>chorionic plate interrupted by indentations (frequently calcified) that reach up to the basal plate: cotyledons</li>
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