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High-Grade Fetal Vascular Malperfusion Is Associated With Diffuse Chorionic Hemosiderosis
Eoghan E Mooney1, Emma Crotty1
1Department of Pathology and Laboratory Medicine, 58003National Maternity Hospital, Dublin, Ireland.
Summary
Diffuse chorionic hemosiderosis (DCH) is linked to high-grade fetal vascular malperfusion (FVM). This study found high-grade FVM occurs more often in placentas with DCH, suggesting a potential connection requiring further research.
Area of Science:
- Perinatal pathology
- Maternal-fetal medicine
- Placental abnormalities
Background:
- Diffuse chorionic hemosiderosis (DCH) is an iron pigment deposition in placental membranes, often linked to preterm delivery.
- Fetal vascular malperfusion (FVM) affects feto-placental circulation, categorized as low-grade (LGFVM) or high-grade (HGFVM).
- A potential association between DCH and FVM was investigated due to their co-occurrence in placental analyses.
Purpose of the Study:
- To explore the association between diffuse chorionic hemosiderosis (DCH) and fetal vascular malperfusion (FVM) in placental tissues.
- To determine if DCH is linked to specific grades of FVM.
- To compare the incidence of FVM in placentas with and without DCH.
Main Methods:
- Retrospective review of singleton placentas diagnosed with DCH via H&E stain over six years.
- Classification of DCH cases based on the presence and grade of FVM (HGFVM, LGFVM, or no FVM).
- Comparison of FVM rates in DCH cases (n=66) versus gestational age-matched controls (n=132).
Main Results:
- High-grade FVM (HGFVM) was present in 21% of DCH cases, compared to 12% in controls.
- Low-grade FVM (LGFVM) was present in 3% of DCH cases, versus 15.9% in controls.
- HGFVM showed a statistically significant association with DCH (P < .0031).
Conclusions:
- High-grade fetal vascular malperfusion (HGFVM) occurs significantly more frequently in placentas exhibiting diffuse chorionic hemosiderosis (DCH).
- Both FVM and DCH are recognized as contributors to adverse perinatal outcomes.
- The precise relationship between DCH and FVM warrants further investigation to clarify their combined impact on pregnancy.
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