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Type: Journal article
Title: Sampling and definitions of placental lesions Amsterdam placental workshop group consensus statement
Author: Khong, T.
Mooney, E.
Ariel, I.
Balmus, N.
Boyd, T.
Brundler, M.-A.
Derricott, H.
Evans, M.
Faye-Petersen, O.
Gillan, J.
Heazell, A.
Heller, D.
Jacques, S.
Keating, S.
Kelehan, P.
Maes, A.
McKay, E.
Morgan, T.
Nikkels, P.
Parks, W.
et al.
Citation: Archives of Pathology and Laboratory Medicine, 2016; 140(7):698-713
Publisher: College of American Pathologists
Issue Date: 2016
ISSN: 0003-9985
Statement of
T. Yee Khong ... et al.
Abstract: Context.—The value of placental examination in investigations of adverse pregnancy outcomes may be compromised by sampling and definition differences between laboratories. Objective.—To establish an agreed-upon protocol for sampling the placenta, and for diagnostic criteria for placental lesions. Recommendations would cover reporting placentas in tertiary centers as well as in community hospitals and district general hospitals, and are also relevant to the scientific research community. Data Sources.—Areas of controversy or uncertainty were explored prior to a 1-day meeting where placental and perinatal pathologists, and maternal-fetal medicine specialists discussed available evidence and subsequently reached consensus where possible. Conclusions.—The group agreed on sets of uniform sampling criteria, placental gross descriptors, pathologic terminologies, and diagnostic criteria. The terminology and microscopic descriptions for maternal vascular malperfusion, fetal vascularmalperfusion, delayed villousmaturation, patterns of ascending intrauterine infection, and villitis of unknown etiology were agreed upon. Topics requiring further discussion were highlighted. Ongoing developments in our understanding of the pathology of the placenta, scientific bases of the maternofetoplacental triad, and evolution of the clinical significance of defined lesions may necessitate further refinements of these consensus guidelines. The proposed structure will assist in international comparability of clinicopathologic and scientific studies and assist in refining the significance of lesions associated with adverse pregnancy and later health outcomes.
Keywords: Stillbirths; Placental
Rights: © 2016 College of American Pathologists
DOI: 10.5858/arpa.2015-0225-CC
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