• Raymond W Redline.
• Department of Pathology, University Hospitals Case Medical Center, Cleveland, OH. Electronic address: raymondw.redline@UHhospitals.org.
• Am. J. Obstet. Gynecol. 2015 Oct 1; 213 (4 Suppl): S21-8.

AbstractPlacental pathology can be useful in a variety of ways including immediate diagnosis of important conditions affecting the mother or infant, identifying conditions that are likely to recur in subsequent pregnancies, separating clinical syndromes into distinct pathological phenotypes for further investigation, and uncovering the underlying cause of unexpected adverse outcomes. Classification of placental lesions has evolved from being a purely descriptive exercise through a stage in which the major pathophysiological processes such as disorders of maternal implantation and the amniotic fluid infection syndrome were first described to a recently proposed comprehensive classification system that includes all of the major maternal and fetal vascular and infectious and idiopathic/immune inflammatory processes (Amsterdam Placental Workshop Group). Implementation of this unified system with reproducible grading and staging should help establish evidence-based recommendations for placental submission and facilitate progress in studying the pathogenesis, diagnosis, and treatment of obstetric disorders with an underlying placental etiology. Copyright © 2015 Elsevier Inc. All rights reserved.

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