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Disappointing interobserver agreement among radiologists for a classifying diagnosis of pancreatic cysts using
Koen de Jong1, Chung Y Nio, Banafsche Mearadji
1Department of Gastroenterology and Hepatology, University of Amsterdam, Amsterdam, The Netherlands.
Objectives:
To assess the degree of interobserver agreement of MRI in the diagnostic assessment of pancreatic cysts (PCs).
Methods:
Magnetic resonance imaging sets of images of 62 patients with PCs (32 with histological confirmation and 30 with clinical diagnosis) were reviewed by 4 experienced radiologists. Features scored included septations, nodules, solid components, pancreatic duct communication, and wall thickening (>2 mm). Radiologists were asked whether they considered the PC mucinous and if the PC was suspicious for malignancy. Furthermore, they had to choose a classifying diagnosis. Intraclass correlation coefficient (ICC) was used to measure agreement within the group.
Results:
Interobserver agreement for septations and nodules was fair (ICC, 0.36 and 0.23, respectively). Agreement for the presence of solid components was fair (ICC, 0.23), agreement for communication with the pancreatic duct was moderate (ICC, 0.53), and agreement for wall thickening was moderate (ICC, 0.44). There was fair agreement for the discrimination between mucinous and nonmucinous PC (ICC, 0.36). Agreement was fair (ICC, 0.26) for a classifying diagnosis and fair for the presence of malignant features (ICC, 0.33).
Conclusions:
Interobserver agreement was poor to moderate for individual PC features, and there was fair agreement for a classifying diagnosis. Magnetic resonance imaging morphology alone did not allow for a reliable discrimination between different types of PC.
Insights
Interobserver agreement for diagnosing pancreatic cysts (PCs) using MRI was poor to moderate for individual features. MRI morphology alone is insufficient for reliably differentiating PC types.
Area of Science:
- Radiology
- Gastroenterology
- Oncology
Background:
- Pancreatic cysts (PCs) are increasingly detected.
- Accurate characterization of PCs is crucial for management.
- Magnetic resonance imaging (MRI) is a key imaging modality for PC assessment.
Purpose of the Study:
- To evaluate the interobserver agreement among radiologists in the diagnostic assessment of pancreatic cysts using MRI.
- To determine the reliability of specific MRI features in differentiating PC types.
Main Methods:
- Four experienced radiologists reviewed MRI scans from 62 patients with PCs.
- Features assessed included septations, nodules, solid components, duct communication, and wall thickening.
- Radiologists determined if cysts were mucinous, suspicious for malignancy, and provided a classifying diagnosis.
- Interobserver agreement was quantified using the intraclass correlation coefficient (ICC).
Main Results:
- Interobserver agreement was poor to moderate for most individual PC features (ICC range: 0.23–0.53).
- Agreement was fair for cyst classification (ICC, 0.26) and detection of malignant features (ICC, 0.33).
- Discrimination between mucinous and nonmucinous PCs showed fair agreement (ICC, 0.36).
Conclusions:
- Interobserver agreement for MRI-based assessment of pancreatic cysts is suboptimal.
- MRI morphology alone is not sufficient for reliable classification and differentiation of pancreatic cysts.
- Further advancements or standardized protocols may be needed to improve diagnostic consistency.
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