Abstract：
INTRODUCTION:Chronic abruption oligohydramnios sequence (CAOS) is histologically characterized by diffuse chorioamniotic hemosiderosis (DCH). However, the criteria for the histological evaluation of the extent of CAOS-related hemosiderin deposition (HD) of the membranes and the difference in HD between the chorionic plate (CP) and fetal membrane (FM) are not well studied. This case control study compared the degree and distribution pattern of HD on CP and FM to present the histological features of DCH and the criteria for histological evaluation. METHODS:From the medical records of Kyoto University Hospital (2010-2019), we selected 20 CAOS cases that were clinically diagnosed by Elliot's criteria. Twenty non-CAOS cases matched to the CAOS group by gestational age were selected as controls. We compared the clinical data and pathological features in the two groups. We performed iron staining in all the cases and analyzed HD in CP and FM according to the histological score (H-Score: 0-12), which was determined as the density (0-3) multiplied by the extent of staining (0-4). RESULTS:HD was found in 100% (20/20) of CAOS and 15% (3/20) of control cases. In both the FM and CP, CAOS cases showed a significantly higher HS than control cases (CAOS, HS = 4-12; Control, HS = 0-1, p < 0.0001). Three CAOS patients presented HD alone in the CP. The HS of the CP was significantly higher than that of the FM (p = 0.0003). DISCUSSION:CAOS presented DCH with HS ≥ 4. This study showed that the CP might be more suitable for evaluating DCH than the FM.
journal_name
Placentajournal_title
Placentaauthors
Ishida A,Minamiguchi S,Yamada Y,Nakagawa R,Chigusa Y,Kondoh E,Mandai M,Haga Hdoi
10.1016/j.placenta.2021.01.013subject
Has Abstractpub_date
2021-01-20 00:00:00pages
1-6eissn
0143-4004issn
1532-3102pii
S0143-4004(21)00021-7journal_volume
105pub_type
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