# Enhancing the Diagnostic Accuracy of Placental Pathology by Using the Amsterdam Consensus Criteria

## TL;DR

This study shows that using standardized criteria improves placental pathology diagnoses and highlights the need for better training and updated guidelines.

## Contribution

The study evaluates the effectiveness of Amsterdam Consensus Criteria in placental pathology diagnosis and identifies areas needing improvement.

## Key findings

- Reassessing placental samples with Amsterdam criteria led to significant changes in diagnoses like MVM and FVM.
- ACA was most consistently documented, but grading and staging were often missing.
- Pathologists showed a lack of understanding of FVM and VUE, indicating a need for education.

## Abstract

Background and objective

Standardizing placental pathology diagnoses is crucial for improving diagnostic accuracy and clinical communication. The Amsterdam Consensus Criteria were developed to address inconsistencies in diagnosing significant placental pathologies. This study aimed to assess the application and effectiveness of the Amsterdam Consensus Criteria in diagnosing placental pathologies, with a focus on improving the reliability and precision of placental pathology reports.

Methods

A retrospective review of 100 consecutively archived placental pathology samples was performed at a tertiary care hospital. These samples, gathered from January through December 2021, were reassessed according to the Amsterdam criteria. The revised diagnoses were then compared with the original descriptive diagnoses.

Results

Significant changes were noted in all principal diagnoses, including maternal vascular malperfusion (MVM), fetal vascular malperfusion (FVM), chronic villitis of unknown etiology (VUE), and acute chorioamnionitis (ACA). This evaluation led to a recategorization of several cases. Frequently, parenchymal infarcts were reported without adequate information to ascertain their association with MVM. Additionally, there was a noticeable lack of understanding of FVM and VUE among pathologists. ACA was the condition most consistently documented. However, detailed grading and staging were often not included.

Conclusions

Our findings emphasize the need to use standardized diagnostic criteria, such as the Amsterdam criteria, to enhance diagnostic accuracy and facilitate communication between pathologists and clinicians. This will ultimately lead to improved patient care outcomes. It also underlines the necessity of continuous education and calibration for pathologists to mitigate interobserver variability. There is a demand to modify these criteria to ensure universal applicability and relevance in various clinical settings.